Latest master paper Tenders | Government master paper Tenders

CTN :36322080

16 Jun, 2024 NA

Aurangabad(Bh) - Bihar

Tender For purchase of necessary equipment- scissor , funnel 2" plastic , u magnet , bar magnet , periscope , tripod stand , kalediscope , glass slab , prism , plan miroor 8x1 , mirror strand , telescope , test tube holder , test ube brush , beaker borosil 100 mi , test tube stand , lense cc , lense cx , magnifying lens 2" , dissecting needle , litmus paper red , litmus paper blue , wire gauge , spring balance , flask conical borosil 250 mi , plastic glass , model of circuit board , torch , plain slide , plastic ball , glass rod , tailor's measuring tape , glass stirrer , pasture piptte s/g , rubber pad , china dish 3" porclin , delivery tube , compass 3/4" both side , 1 c.c. spoon , graduated syringe , protactor , slinky , plastic (3ml) pasteur pipette , dispensing bottles , vials , cotton thread , candle , forceps , iron nails (assorted size) , test tube brush , knife , screw driver , shaving blade , dissecting needle , petridish , pair of tongs , micro test tube rack , measuring cylinder , filter paper , sun dial , spring balance , floating magnets , hand pump activity , wind power crane , internal organs , seasons & clothes , life cycle , make your own bridge , model of teeth , solar heater , air powered car , plant garden , day and night model , solar system , bulging of the earth , magnetic compass (small 1/2") both side glass , magnet bar - 2" alnico , horse shoe magnet ('u' shaped)-2" alnico , prism glass 2"x2" , physical balance , analytical fraction weight box , vernier callipers- 6" (0-150 mm) ime type in box , screw guage- (0.25 mm) ime type in box , glass slab-75x50x18 , glass slab-100x60x18 , stop clock , tuning fork (set of 8) , wall thermometer (maximum and minimum) , laboratory thermometer , spherometer (dereble disc) , plano convex lens 3" , plano concave lens 3" , concavoconvex lens 3" , convexoconcave lens 3" , concave mirror- 3" (10 cm) focal length , concave mirror-3" (20 cm) focal length , concave mirror-2" (10 cm) focal length , concave mirror-2" (20 cm) focal length , plane mirror (half) 4x1 , plane mirror (full) 6x1 , lens stand , pemdulam bob (different weight and size) , foot stand , stop watch racer digital , thermometerf/r/c , boiling test tube , hand lens (magnifying glass) , digital multimeter , ammeter (different ranges) om , digital multimeter , ammeter (dufferent ranges) , ammeter (different ranges) milli ammeter o , ammeter (different ranges) micro ammeter om , voltmeter (different ranges) 0-30 volts om , voltmeter (different ranges) 0-03 volts, om , galvanometer om , drawing board 12"x18" , drawing pin , leclanche cell , hook law apparatus , spring balance- 250 gms , spring balance-500 gms , dry cell 1.5 volt , l.e.d. bulb (different colours) , pivoted weston type galavanometer , one way key , 2way key , 4way key , low power led

CTN :35797065

19 Jun, 2024 NA

Mumbai - Maharashtra

Tender For corrigendum : sch 10 supply of laboratory articles, glassware, etc - laboratory articles glasswares, microscopic glass coverslips no.1 english glass 22 22 0.1mm with isi mark., microscopic glass coverslipsno.1 english glass 22 60 0.1mmwith isi mark, pencils, glass marking superior red,heat resisting indelible., pencils, glass marking superior blue,heat resisting indelible., petri dishes 10 cm diameter and1.7 cm. height.with flat even base and even wall thickness, made of 3.3 borosilicate glass, clearand transparent with consistent optical performance, capable of withstanding repeatedautoclaving with low coefficient of thermalexpansion, chip and break resistant and able to survive everyday shocks, test tubes hard glass without rim, (150mm 20mm), test tubes without rim, (150mm 15mm) superior hard neutral, heat resistant glass with uniformthickness as 1-1.2 mm, test tubes with rim, id (55mm 7.5mm)superior hard neutral, heat resistant glass with uniformthickness as 1-1.2 mm, test tubes kahn, thick wall without rim (90mm 10mm) hard neutral, heat resistantglass with uniform thickness as 1-1.2 mm, test tubes, thick wall 75mm with rimlong 10 mm diameter hard neutral,heat resistant glass with uniformthickness as 1 -1.2 mm, test tubes, wasserman (100mm 12.5mm)hard neutral, heat resistant glass with uniformthickness as 1- 1.2 mm, blank stickers label (50 mm 19mm) adhesive, thermometeres, clinical centigrade1/2 minute isi mark., thermometeres rectal centigrade1/2 minute isi mark., pasture pipette with rubber tit., vial boxes 50 vials capacity for 2ml storage vials., blood collection 2 way needle for vaccum tube collection 21g x1"", wester green esr tubes-good quality,sterdy, borosillicate glass, uniform bore,open at both ends, total length 300 mm long,id 2.5 mm, graduated in mm, graduationmarking from bottom to top as 0-200, shouldbe permanent and accurate, non staining andreusable glass., sahali pipette (for hb,cbc), litmus ph paper red & blue(for urine examination), rbc diluting pipettes having graduatedcapillary tube with 0.5 and 1.0, mixingbulb with a white glass bead & a shortcapillary tube above bulb with a mark., safety blood collection winged set 21g x 0.75inch.needle 7.12 inch tubing in shape ofbutter fly winged set used for blood collectionand infusion set with adaptor manually activated safety shield to fully cover needlewhich help in reducing needle stick injury, auto retractable, single use safety lancethaving calibrated depth of 1.8mm forcapillary collections, autocloavable glass tubes, transluscent,bakelito cap with silicon rubber gasket having5ml capacity individual tubes size approx.12 75 mm +/-2mm, plastic vial boxes for storage of tubes of 5 mlcapacity, individual tubes size approx,12 75 mm +/-2mm, each box having slots for20 tubes, sterile, individually packed, disposable flexibleloops, 4 mm (+/-0.1mm) internal diametercalibrated to 0.01 ml, preheparinised syringes for blood gas analysisa) spray dry calcium balance lithium heparlin coated syringes, with provision to cap the syringes after sample collection.b) capacity to collect minimum 0.5 ml blood.c) should be able to aspirate present volume sample, cheek retractor - size adult, cheek retractor - size child, loop holders, straight wire, borosil 500 ml bottle for media preparation, flask 2000 ml, flask 500 ml, flask 200ml, measuring cylinder 500 ml, butter paper a4 size, cryovials 1x100 packets, adhesive rtpcr plate sealers, filter card for cytocentrifuge, glass beaker 50 ml, paper roll, pipettes 5 ml, pipettes 10 ml, enamel tray 12*15, enamel tray 12*10, enamel tary 8*10, bowl big, bowl small, wire gause basket big, wire gause basket small, staining jars with lids - steel, staining jars with lids - glass, petri dish 15 cm diameter and 1.7 cm height borosilicate glass, staining cradle steel, dropper bottle plastic, spirit lamp, glass rods 5- 6 mm diameter 6-7 inch long, dropper bottle glass, stain bottles, concave glass, grouping bottle, steel moulds(medium sq

CTN :36112478

12 Jun, 2024 NA

Nandurbar - Maharashtra

Tender For corrigendum : supply of lab equipments items physics chemistry biology nd maths in jawahar navodaya vidyalaya akkalkuwa dist nandurbar i - chemistry lab equipement (2024-25), ammonium molybdate (loba chemicals), aniline (loba chemicals), formaldehyde (loba chemicals), ammonium carbonate (loba chemicals), oxalic acid (loba chemicals), amonium sulphide solution (loba chemicals), iodine crystal (loba chemicals), potassium dichromate (loba chemicals), potassium chromate (loba chemicals), ammonia solution (loba chemicals), sodium chloride (loba chemicals), sodium hydroxide (loba chemicals), sodium thiosulphate (loba chemicals), potassium iodate (loba chemicals), sodium sulphite (loba chemicals), rubeanic acid sparay reagent for tlc (loba chemicals), cobalt nitrate (loba chemicals), benzaldehyde (loba chemicals), sulphur powder (loba chemicals), magnesium ribbon (loba chemicals), alpha naphthol (loba chemicals), beta naphthol (loba chemicals), silver nitrate solution (loba chemicals), litmus papers (red/blue) (loba chemicals), lead acetate paper (loba chemicals), ph papers (loba chemicals), calcium oxide (loba chemicals), sucrose powder (loba chemicals), ammonium chloride (loba chemicals), fructose powder (loba chemicals), bromine water (loba chemicals), potassium alum (loba chemicals), ferrous ammonium sulphate (loba chemicals), hydrochloric acid (merck), ferrous sulphate (loba chemicals), glacial acetic acid (merck), potassium oxalate (loba chemicals), potassium iodide (loba chemicals), phenolpthalein solution (loba chemicals), barium nitrate ( loba chemicals), meta dinitrobenzene (loba chemicals), ammonium iodide( loba chemicals), paraffin liquid (merck), acetone (merck), isopropanol (merck), sulphuric acid (merck), ethyl alcohol (merck), evaporating dish 3" dia (borosil), funnel 3" dia glass (borosil), test tube 5*5/8 fine glass (borosil), conical flask 100 ml borosil (borosil), beaker 250 ml borosil (borosil), beaker 100 ml borosil (borosil), beaker 500 ml borosil (borosil), volumetric flask 250 ml glass (borosil), volumetric flask 500 ml glass (borosil), burette 25 ml glass (borosil), washbottle 250 ml polythene (borosil), glass rod stirrer (borosil), pipette 10 ml glass (merck), measuring cylinder 10 ml (borosil), measuring cylinder 50 ml (borosil), reagent bottle 500 ml narrow mouth (borosil), kipps apparatus polyethylene ( borosil), watch glass 4" dia (borosil), electric weighing machine (analytical balance weighing compact scale), thermometer 360 c (borosil), platinum wire (borosil), test tube holder (borosil), crucible tongs 6" long (borosil), wire gauge with frame (borosil), dropper with rubber teat (borosil), distilled water (merck), dimineralised water (merck), chromatography paper standarad (loba chemicals), chromatography jar 3*7 inch (borosil), retort stand with clamp (borosil), milli voltmeter (om labs), daniell cell apprahus (om labs), physics lab equipement (2024-25), electrolytic capacitors kit of different values (sun robotics capacitors), resistors kit of different values (electrobot), diodes 1n4007 multi purpose (good quality per kg), convex lens small focal length (+30cm) (comet double convex lens), convex lens large focal length (+15 cm) (comet double convex lens), concave lens small focal length (-15cm) (comet double convex lens), glass slab, sliding rheostat value- 100 ohm(omega), travelling microscope (esaw india), prism (vijay surgical prism), p n junction diode apparatus (electromotive), micrometer screw guage 0-25mm (kristeel/(or)comet), vernier callipers (pullox), spring balance 500g (om labs), sonometer (rea), light dependent resistor(ldr) sensor (techleads), light emitting diode (led) different colours (scriptonics), measuring cylinder 100 ml borosil material (good quality per unit), helical spring length of 1meter (good quality of steel material cost per meter), series and parallel resistor circuit kit (good quality), optical bench (arg labs), spherometer (the first lab), inclined plane apparatus

CTN :36286481

24 Jun, 2024 6.80 Lacs

Lucknow - Uttar Pradesh

Tender For supply of lab item and consumables - steel balls robonic clot copagulation analyser robonic pkt of 50 balls , hcv antibody elisa detection test of 96 kits , leishmans stain with buffer 500ml , gram s stain himedia , isopropyl alcohal swab , glass tube 100 x 10 mm , test glass size 12x100mm test tube borossil , flash back needle holder , typhi dot tests , kb001 hiimvic biochemical test kit for enterobacteriaceae sp , kb002 hi assorted biochemical test kit for gnb , kb004 histaph kit for identificatio of genus staphylococcus , dimension c reactiva protein flex crp 10444894 , tissue embedding cassette stainless steel small , tissue embedding cassette stainless steel medium , tissue embedding cassette stainless steel large , embedding ring plastic , tissue embedding base mould stainless steel small , tissue embedding base mould stainless steel medium , tissue embedding base mould stainless steel large , frosted microscope slide 22x75 mm , plastic tissue processing cassettes pkt of 100 , coplin jar plastic , acid hydrochloric arrenic fire , benedict solution qualitative , drabkins solution diluting solution for haemoglobin estimation by cyanmet haemoglobin method , kits for estimation of albumin , kits for estimation of protein , methylene blue , sodium hypochlorite 4 percent , stain methylene blue , kit for ldl cholesterol by direct estimation , kit for estimation of amylase 12 x 5 ml , vdrl rapid test kit , hemospot for stool occult blood pkt of 25 , litmus paper strip , ana rapid test kit , wbc diluting fluid , platelet count diluting fluid , brush cleaning large , brush cleaning small , disposable venous blood collection needle , sulphur powder , weak iodine solution , wintrobe s tube , de ionised water , centrifuge tube conical graduated 10 ml in 0 point 1 ml , disposable slide tray plastic , ph strip , ultrasound jelly tube of 250mg

CTN :36280655

21 Jun, 2024 2.00 Lacs

Darjeeling - West Bengal

Tender For supply of cap lycopene and beta carotene and lutein multivitamin and multimineral softgel , cap vit e 400mg , tab folic acid 5mg , cap methylcobalamin 750mg and pregabalin 75mg , syp l carnosine , tab gabapentin 400 and nortriptylline 10mg , cap alpha lipoic acid,beta carotene,copper,selenium,lycopene,vit e,zn , tab alpha lipoic acid methylcobalamine vit d3 pyridoxine , cap pregabalin 75mg , liq lactulose , lotion calamine 8 per with 10 perc light liquid paraffin, 50 ml bott , tab prednisolone 10mg , tab montelukast 10mg and levocetrizine 5mg , oint clobetasol and neomycin and miconazole and zno and borax 10gm , oint terbinafen and oflox and ornida and clobetasol 10gm , oint triamcinolone acetonide 0.1perc for oral use tube of 5gm , oint framycetin sulphate cream 1perc 20gm , e d brinzolamide soln 1 perce , e d bimatoprost 0.01perce , e d ciprofloxacin .3 perc eye drops of 3mg ml 5ml , e d ciprofloxacin 0.3perc and dexamethasone 0.1 perc bott , e d polyethylene glycol 400 and propylene 0.4 3 perc , e d travoprost ophth soln 2.5 ml , inj dicyclomine 20mg and 2ml , inj ethamsylate 250mg 2ml , inj etophylline bp 84.7mg and theophylline ip 25.3mg per ml 2ml deriphylline , inj mecobalamin and pyridoxine and nicotinamide , inj frusemide 20mg 2ml , desensitising paste stannous fluoride and potassium nitrate sodium monofluro-phosphate tube of 40 to 55 ml or gm , antiseptic mouthwash , blue litmus paper blue , ketosticks of 50 tests , platelet diluting fluid 500ml , prothrombin time kit 5ml tulip , red litmus paper acid , weak iodine solution 500ml

Central Government/Public Sector

CTN :36263116

19 Jun, 2024 NA

Muzaffarpur - Bihar

Tender For supply of sealing wax , fevigum 30 ml , fevigum 700 ml , cellotape 2 inch , cellotape 1 inch , eraser , cobra file , folder file , pencil battery aa , whitner pen , register 1 qr , register 2 qr , napthalein ball , harpic 500 ml , room freshner , stapler pin small , a4 paper 75 gsm , knife , single punching machine , tag , vim dishwash liquid , dustless white chalk , hit spray big , dusting cloth , toilet brush , lizol 500 ml , jetter refil black , surf 500 gm , wiper 24 inch , battery water 5 ltr , 9 volt battery , pencil battery aaa , wire clip 6mm , wire clip 8mm , saddle clamp 20 mm , metal water tap , taflon tape , tubular fluroscent lamp 40 w , fan regulator , ss combined power box , chisel batari , 4 model plastic box , mcb double pole 63 a , mcb 4 pole 100 a , pa driver unit 60 w , electric tape , pvc gully 1 inch , switch box 7x4 , socket 3 pin 6 a , switch 6 a , sodium carbonate 500 gm , phenophathelein indicator 500 ml , methyl orange 500 ml , litmus solution 500 ml , gypsum 500 gm , yeast powder 500 gm , lead nitrate solution 500 ml , potassium iodide solution 500 ml , sodium sulphate 500 ml , silver nitrate 500 ml , calcium oxide 500 gm , silver chloride 500 gm , silver bromide 500 gm , baking soda 500 gm , laser pen ray , ethanol 500 ml , nitric acid 500 ml , laboratory thermometer , clinical thermometer , aluminium sulphate 500 ml , chemical drooper , hand magnified lens , test tube holder , test tube brush , beaker 250 ml , filter paper , glass wool , 3 d model of diamond and graphite , boiling test tube , formaldehyde 500 ml , test tube , iodine solution 500 ml , prism , glass slab , concave mirror , convex mirror , plane mirror , magnet bars , horse shoe magnet , mirror stand , volleyball net , badminton racquet , badminton racquet grip , shuttle cork , badminton net , air pump , table tennis racquet , carrom coin with striker , ludo big , dome marker small , plastic baby hurdles 6 inch , hurdles standard , sports agility training badder 4 mtr , plastic box medium , trunk 6x3 , link lock 45 no. , cricket bat sg , achivers board , poster board , indoor led light for table tennis , lawn tennis net , table tennis table , yoga mat 6mm , volleyball , badminton , lawn tennis ball

Central Government/Public Sector

CTN :36261428

19 Jun, 2024 NA

West Singhbhum - Jharkhand

Tender For tender for supply of superior phenol 500 gm , sodium hydroxide (beads) 500 gm , sulphuric acid 2ltr , hydrochloric acid 2ltr , nitric acid 2ltr , benzoic acid 500 gm , propenoic acid 500 ml , acetic acid 500 ml , oxalic acid 500 gm , phthalic anhydride crystals 500 gm , aniline 500 ml , naphthol beta 250 gm , benzaldehyde 500 ml , acetaldehyde 500 ml , formaldehyde 500 ml , fehling -a solution 500 ml , fehling -b solution 500 ml , tollens reagent 100 ml , absolute ethanol 500 ml , cerric ammonium nitrate 100 gm , sodium hydroxide solution 500 ml , benzophenone 250 gm , acetophenone 500 ml , meta-dinitro benzene 250 gm , sodium-nitroprusside solution 100 gm , calcium chloride 500 gm , iodine solution 125 ml , metallic sodium 100 gm , sodium bicarbonate 500 gm , sodium carbonate 500 gm , mohr's salt 500 gm , barium chloride solution 500 ml , ammonium molybdate 100 gm , ammonium hydroxide solution 500 ml , ammonium chloride (solid) 500 gm , ammonium carbonate (solid) 500 gm , potassium chromate solution 500 gm , ammonium sulphate (solid) 500 gm , ammonium oxalate (solid) 500 gm , ammonium hydrogen phosphate (solid) 500 gm , potassium iodide solution 100 gm , nessler reagent 125 ml , sodium sulphide 500 gm , blue litmus solution 125 ml , ammonium thiocynate crystals 250 gm , dimethyi glyoxime 100 gm , barium nitrate (solid) 500 gm , lead nitrate (solid) 500 gm , zinc sulphate (solid) 500 gm , potassium hydroxide 500 gm , potassium chloride 500 gm , ferric hydroxide 500 gm , bromine water 500 ml , solid borax 500 gm , cobalt nitrate 100 gm , potassium oxalate (hydrated) 500 gm , lead acetate 500 gm , calcium carbonate 500 gm , strontium carbonate 250 gm , lead chloride 500 gm , chloroform 500 ml , carbon disulphide 500 ml , ammonium acetate 500 gm , silver nitrate solution 125 ml , lead nitrate 500 gm , distilled water 5 ltr , test tube 10 ml , beaker 10ml , beaker 20 ml , beaker 50 ml , beaker 100ml , distilled water bottles 250 ml , glass dropper , funnel , round bottom flask (100ml) , measuring flask 10ml , measuring flask 50 ml , burette 50 ml , conical flask (25ml) , pipette (10ml) , burette stand , kipp's apparatus 500 ml , digital balance l.c. 0.1gm (100mg) , spatula , tripod stand , china dish , sand bath , beaker 250ml , bunsen burner , filter paper , ph paper , litmus paper blue , litmus paper red , glass stirrer 8" , platinum wire , wire gauze , water bath , thermometer

Central Government/Public Sector

CTN :36253205

17 Jun, 2024 NA

Muzaffarpur - Bihar

Tender For supply of thread ball , pencil , sticky notes , sealing wax , fevigum 30 ml , fevigum 700 ml , cellotape 2 inch , cellotape 1 inch , eraser , cobra file , folder file , sharpner , pencil battery aa , pencil battery aaa , whitner pen , pentonic pen , register 1 qr , register 2 qr , napthalein ball , harpic 500 ml , colin 500 ml , room freshner , stapler pin small , a4 paper 75 gsm , scissors big , knife , single punching machine , tag , vim dishwash liquid , scrub , dustless white chalk , dustless colour chalk , hit spray big , dusting cloth , toilet brush , lizol 500 ml , jetter refil black , surf 500 gm , wiper 24 inch , ph paper , litmus paper , mohr salt 500 gm , ferric chloride 500 gm , ferrous sulphate 500 gm , oxalic acid 500 gm , sodium sulphate 500 gm , tollens reagent 125 ml , fehling solution a 500 ml , fehling solution b 500 ml , silver nitrate 25 gm , sulphuric acid 500 ml , ammonium sulphate 500 gm , barium hydroxide 500 gm , calcium sulphate 500 gm , calcium chloride 500 gm , carbon disulphate 250 ml , glycerol 250 ml , distilled water 5 ltr , lpg refil , voltmeter , ammeter , battery eliminator , rheostat 50 ohms , one way key , connecting wires , metre bridge and jockey , galvanometer , resistance box , screw gauge , potentimeter with jockey , optical bench 1 and half mts , convex lens focal length 10 cm , convex lens focal length 15 cm , convex lens focal length 20 cm , drawing pin , spherometer , travelling microscope , p n junction , multimeter , plane mirror , concave mirror focal length 20 cm , ohm law apparatus , vernier callipers , iron stand with base and clamp , penulum bob , stop clock , physical balance , parallelogram law of forces apparatus , young modulus apparatus , hooks law apparatus , sand paper , methyl orange 500 ml , phenolphatheline 500 ml , magnesium hydroxide 500 ml , sodium hydroxide 500 ml , baking soda 500 gm , ebonite rod , yeast powder 500 gm , ethanol 500 ml , sodium carbonate 500 gm , phenophathelein indicator 500 ml , litmus solution 500 ml , gypsum 500 gm , lead nitrate solution 500 ml , potassium iodide solution 500 ml , sodium sulphate 500 ml , silver nitrate 500 ml , calcium oxide 500 gm , silver chloride 500 gm , silver bromide 500 gm , laser pen ray , nitric acid 500 ml , laboratory thermometer , clinical thermometer , aluminium sulphate 500 ml , chemical drooper , hand magnified lens , test tube holder , test tube brush , beaker 250 ml , filter paper , glass wool , 3 d model of diamond and graphite , boiling test tube , formaldehyde 500 ml , test tube

CTN :36122762

07 Jun, 2024 NA

Morbi - Gujarat

Tender For corrigendum : supply of maths and science kit (q3) - ammeter, laser light, lens concave, lens convex, lens stand wooden, glass slab, prism, colour disk, gold leaf electroscope, transparent tube, tuning fork, tuning fork pad, syringe-15ml, copper wire, protector, electrical circuit, led 10mm, slinky, magnet 4 pices set, water voltameter plastic, spring scale 1kg, decimeter cube plastic, thermometer clinical, 110 thermometer, retort stand with clamp, 9 clamp, gas burner with lpg, tripod stand, sun dial, steel ball, pully with frame, aluminium wire, bimetallic strip, steel wire, bannan clip connector, set of 4 resistance, magnetic compass, elc. bell, v meter, forceps, tt brush, tt holder, thermocol sheet, mirror strip-3, emery paper, sand paper-3, lens + meter stand, rubber sheet, cutter, surgical scissor, screw driver, hammer, scalpel, dissecting needle-2, pair of tongs, petri dish plastic, micro tt-2, universal indicator, phenolphthalein, magnesium ribbon, iron filling, litmus red and blue, methylated spirit, dirpper, funnel plastic, filter paper-10, dispensing bottle 2, two nose microscopr1(151), measuring cylind, test tube stand, dialectic spoon, china dish, wash bottle, generator model, periscope, plug key, crocodile clip + wire, rubber ring, balloon 1 packet, thread reel, candle-2, rubber sucker, magnifying glass, beaker 50ml, glass slide-10, colour slip-20, glass rod-2, bell jar, glass tube-2, u shape glass, watch glass, double concave mirror 2", ready slide-3, double convex mirror 2", 5 baking soda, 5 sodium chloride, calcium oxide, 3 copper sulfate, sodium hydroxide, methylene blue