02/2024-25/STLRAI

Supply of Laboratory Chemicals & Glassware : (Details specification appended separately in SOQ)

2,4-Dinitrophenylhydrazine : Melting range 9after drying) 196 to 199; 196°C, Sulfated ash NMT 0.1%

Ammonium (solution 25%) : Assay (NH3 ) NLT 25%, chloride (CI) NMT 0.00005 %, Sulfate (SO4) NMT 0.0002%, Phosphate(PO4) NMT 0002% Substances reducing KMnO4 conforms, Heavy metals (as Pb)NMT 0.00005% m, Residue on ignition (as sulfate)NMT 0.002%

Ammonium solution 25% : Assay (NH3 ) NLT 25%, chloride (CI) NMT 0.00005 %, Sulfate (SO4) NMT 0.0002%, Phosphate(PO4) NMT 0002% Substances reducing KMnO4 conforms, Heavy metals (as Pb)NMT 0.00005% m, Residue on ignition (as sulfate)NMT 0.002%

Ammonium acetate : Assay (CH3COONH4) ) NLT 97%, pH-value (5% w/v; water) 6.7 to 7.3, chloride (CI) NMT 0.0005 %, Sulfate (SO4) NMT 0.0001%,Nitrate (NO3 ) NMT 0.001% , Residue on ignition (as sulfate)NMT 0.001%, insoluble matter NMT 0.005%

Ammonium fluoride : Assay (NH4F) NLT 95 %, pH-value (5% w/v; water) NLT 5.7, Hexafluorosilicate (SiF6) NMT 0.2 %, Sulfate (SO4) NMT 0.02 %, Iron (Fe) NMT 0.002 %, Lead (Pb) NMT 0.002 %, Non-volatile substances NMT 0.02 %.

Ammonium heptamolybdate : Assay( as MoO3) 81 to 83, Chloride (Cl) NMT 0.002 %, Nitrate (NO3) Conforms, Sulfate (SO4) NMT 0.02 %, Lead (Pb) NMT 0.001 %, Magnesium (Mg) NMT 0.005 %, Potassium(K) NMT 0.01 %, Sodium(Na) NMT 0.01 %, Insoluble matter NMT 0.005 %, Heavy metals (as Pb) NMT 0.001 %, Phosphate, arsenate, silicate ( as SiO2) NMT 0.001 %

Ammonium iron sulphate hexahydrate : Assay [(NH4)2Fe(SO4)2.6H2O] 98.5 to 101.5, Insoluble matter NMT 0.01 %, Iron (Fe+++) NMT 0.01 %, Zinc (Zn) NMT 0.003 %, Magnesium (Mg) NMT 0.002 %, Test solution[10% w/v; The solution is clear & complete

L-ascorbic Acid : Assay (C6H8O6) 99.6 %, Heavy metals (as Pb) 0.001 %, Residue on ignition (as sulfate) 0.1 %

Azomethine-H : Specification: Absorptivity A 1% /1cm (236nm; 0.05%, 1cm, buffer Solution pH 5.1) ≥1200, Loss on Drying (105°C) ≥2.0, Suitability for Photometric (determination of boron) conforms

Barium chloride dehydrate : Assay (BaCl2.2H2O) NLT 99 %, pH-value (5% w/v; water) 5.2 to 8.2, Insoluble matter NMT 0.005 %, Heavy metals (as Pb) NMT 0.0005 %, Strontium (Sr) NMT 0.1 %, Oxidizing substances (as NO3) NMT 0.005 %, Loss on drying (150 °C) 14 to 16

BORIC ACID

Boron standard solution (AAS std)-1000ppm : Traceable to SRM from NIST H3BO3 in H2O 1000 mg/I B Certipur Metrological traceability: Directly traceable to NIST SRM 3107, lot 190605, Certified value as mass fraction 1001mg/kg, Associated uncertainty, U=k•u (k=2) as mass fraction ± 6mg/kg

Bromocresol green indicator : Transition range: pH 3.6 : Yellow-green pH 5.2 : Blue Specific Extinction (E 1%/1cm; lambda : NLT 230 , Specific Extinction (E 1%/1cm; lambda: NLT 490 , Loss on drying (105°C): NMT 3 %

pH 4.0 Buffer Solution : Clear, colourless solution, pH-value of solution at 20 °C : 3.98 to 4.02

pH 7.0 Buffer Solution : Clear, colourless solution, pH-value of solution at 20 °C : 6.98 to 7.02

pH 9.0 Buffer Solution: Clear, colourless solution, pH-value of solution at 20 °C : 8.98 to 9.02

Calcium chloride dehydrate : Assay (CaCl2.2H2O; Complexometric) : 99 to 105, pH-value (5%; water, 25 °C) : 4.5 to 8.5, Heavy metals (as Pb): NMT 0.0005 %, Oxidisable substances(as NO3): NMT 0.003 %

Copper standard solution (AAS std)- 1000 ppm : Metrological traceability: Directly traceable to NIST SRM 3114, lot 120618, Certified value as mass fraction 986 mg/kg, Associated uncertainty, U=k•u (k=2) as mass fraction ± 5 mg/kg

Di ethylene triaminepenta acetic acid : Assay (complexometric, calc. on anhydrous substance) 100%, pH-value (saturated solution) 2.4

Diphenylamine Indicator : Purity (GC): NLT 98 %, Melting range : 52.5 to 54, Sulfated ash : NMT 0.03 %, Loss on drying (over silica gel ) : NMT 1 %, Substances insoluble in ethanol : Conforms

Ethanol- Absolute(95% pure) : Purity: 99%, Acidity and Alkalinity : ≤ 30, Density ( d 20°C / 20°C ): 0.790-0.793

Ethylene di amine tetra acetic acid di-sodium salt : Assay (C10H14N2Na2O8; : 99 to 101, pH of a 5% solution at 25.0°C : 4 to 6 , Insoluble matter : NMT 0.005 %, Nitrilotriacetic acid : NMT 0.1, Heavy metals (as Pb) : NMT 0.005 %, Iron (Fe) : NMT 0.01 %

Glacial acetic acid : Assay (CH3COOH) : NLT 99.7 % , Non-volatile substances : NMT 0.001 %, Titratable base : NMT 0.0004 meq/g, Colour (APHA) : NMT 10 HU, Heavy metals (as Pb) : NMT 0.00005 %, Acetic anhydride : NMT 0.1 %

Glacial acetic acid : Assay (CH3COOH) : NLT 99.7 % , Non-volatile substances : NMT 0.001 %, Titratable base : NMT 0.0004 meq/g, Colour (APHA) : NMT 10 HU, Heavy metals (as Pb) : NMT 0.00005 %, Acetic anhydride : NMT 0.1 %

Gum Acacia

Hydrochloric acid (Concentrated)- 35 % : Assay (HCl) NLT : 35 %, Heavy metals (as Pb) : NMT 0.001 %, Residue on ignition (as sulfate) NMT : 0.005 %

Iron standard solution (AAS std)- 1000 ppm : Metrological traceability: Directly traceable to NIST SRM 3126a, lot 140812, Certified value as mass fraction 987 mg/kg, Associated uncertainty, U=k•u (k=2) as mass fraction ± 5mg/kg

Manganese standard sol. (AAS std)- 1000 ppm : Metrological traceability: Directly traceable to NIST SRM 3132, lot 050429, Certified value as mass fraction 986 mg/kg, Associated uncertainty, U=k•u (k=2) as mass fraction ± 5mg/kg

Methyl red Indicator : Transition range : pH 4.4 : Red, pH 6.2 : Yellow Specific extinction (E 1%/1cm; lambda max1 524 nm; pH 4.4) 1577.1, Specific extinction (E 1%/1cm; lambda max2 430 nm; pH 6.2) : 733.3

Mixed indicator : Application Test : Conforms, pH-Value (20°C) : 4.5-5.0

Nitric Acid – 69% (Concentrated) : Assay (HNO3) : 68 to 70, Arsenic (As) : NMT 0.000001 %, Heavy metals (as Pb): NMT 0.00002 %, Residue on ignition (as sulfate) :NMT 0.0005 %

Ortho phosphoric acid- 85% : Assay (H3PO4) 99 %, Heavy metals (as Pb) : 0.001 %, Insoluble matter 0.001 %

Ortho phosphoric acid- 85% : Assay (H3PO4) 99 %, Heavy metals (as Pb) : 0.001 %, Insoluble matter 0.001 %

Oxalic acid : Assay (C2H2O4.2H2O) : 99.5 to 102, Insoluble matter

Potassium chloride : Assay (KCl) NLT 99 %, pH-value (5% w/v; water) : 5.5 to 8.5, Heavy metals (as Pb) NMT 0.002 %

Potassium dichromate : Assay (K2Cr2O7) : NLT 99 %, Insoluble matter : NMT 0.005 %, Loss on drying (105°C) : NMT 0.05 %, Iron (Fe) : NMT 0.001 %, Calcium (Ca) :NMT 0.003 %, Sulfate (SO4) : NMT 0.005 %

Potassium dihydrogen orthophosphate : Assay (KH2PO4) ; NLT 99 %, pH-value (5% w/v; water) : 4.1 to 4.5, Loss on drying : NMT 0.2 %, Insoluble matter : NMT 0.01 %, Heavy metals (as Pb) : NMT 0.001 %,

Potassium permanganate : Identity K: Conforms, MnO4: Conforms Assay (KMnO4) 99 %, Sulfate (SO4) 0.01 %

Potassium standard solution (AAS std)- 1000 ppm : Metrological traceability: Directly traceable to NIST SRM 3141a, lot 140813, Certified value as mass fraction 986 mg/kg, Associated uncertainty, U=k•u (k=2) as mass fraction ± 5mg/kg

Silver nitrate : Assay (AgNO3) :99 %, Substances not precipitated by :0.002 %, Chloride (Cl) : 0.0003 %

Sodium bicarbonate- P free : Assay (NaHCO3; acidimetric, calc.: 99.7 to 100.3, Phosphate (PO4) : NMT 0.001 %, Insoluble matter : NMT 0.015 %, Heavy metals (as Pb) : NMT 0.0005 %, Sulfur compounds (as SO4) : NMT 0.003 %, Ammonium (NH4) : NMT 0.0005 %

Sodium chloride : Assay (NaCl) NLT 99 % 100.74 %, pH-value (5% w/v; water) 5 to 9 6.17, Insoluble matter NMT 0.005 % 0.002 %

Sodium hydroxide pellets : Assay (NaOH) NLT 99.6 %, Nitrogen compounds (N) NMT 0.001 % 0.0004 %, Heavy metals(as Pb) NMT 0.002 % 0.0006 %

Sulfuric Acid-98%(Concentrated) : Assay (H2SO4): 97.94 %, KMnO4 reducing substances (as SO2) NMT 0.0002 %, Residue on ignition (as sulfate) NMT 0.0005 %

Tin(II) chloride dehydrate : Assay (SnCl2.2H2O): 98 to 103, Calcium (Ca) : NMT 0.005 %, Potassium (K) : NMT 0.005 %, Sodium (Na) : NMT 0.01 %

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B,. (Borosilicate glass)

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B,. (Borosilicate glass)

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B,. (Borosilicate glass)

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B. (Borosilicate glass)

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B. (Borosilicate glass)

Measuring cylinders, graduated, single metric scale, with pour out, with hexagonal base, Class B. (Borosilicate glass)

Flasks, Erlenmeyer, conical, narrow mouth . (Borosilicate glass)

Flasks, Erlenmeyer, conical, narrow mouth . (Borosilicate glass)

Flasks, Erlenmeyer, conical, narrow mouth . (Borosilicate glass)

Flasks, Erlenmeyer, conical, narrow mouth . (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B,. (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B, (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B,. (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B,. (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B,. (Borosilicate glass)

Flasks, Volumetric, with interchangeable solid glass stopper, accuracy as per Class B, (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Beakers, griffin, low form, with spout. (Borosilicate glass)

Autoburette, with Glass stopcock, Class B,. Complies with IS 1997/ISO 385. Supplied with Reservoir and Rubber Bellow, with automatic zero facility. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Pipettes, Measuring (Mohr types), Class B. (Borosilicate glass)

Funnels, Plain, 60° Angle, Short Stem . (Borosilicate glass)

Funnels, Plain, 60° Angle, Short Stem . (Borosilicate glass)

Glass rods

Glass cuvette (Quartz)

Reagent Bottle, wide mouth, graduated with screw cap. (Borosilicate glass)

Beaker with spout (Material-PP)

Beaker with spout (Material-PP)

Volumetric Flask (Material-PP)

Volumetric Flask (Material-PP)

Measuring Cylinder graduated, with pour out. (Material-PP)

Funnels, Plain, 60° Angle, Short Stem. (Material-PP)

Funnels, Plain, 60° Angle, Short Stem. (Material-PP)

Wash Bottle. (Material-PP)

Plastic tray

Filter Paper -1 ( Pack of 500 Sheets)

Filter Paper -42 ( Pack of 100 Sheets)

Tissue roll

Das Scientific House (BID ID -5782273)

M/S LAXMI ENTERPRISE (BID ID -5780860)

Das Scientific House

CHATTERJEE ENTERPRISE