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CAS NO: 7757-79-1

MOLECULAR FORMULA :- KNO₃

MOLECULAR WEIGHT :- 101.1g/mol

SPECIFICATION	BP	USP
Description	White or almost white, crystalline powder or colorless crystals.	White or almost white, crystalline powder or colorless crystals.
Solubility	Freely soluble in water, very soluble in boiling water, practically insoluble in ethanol (96 %)	–
Identification A. Reaction B. Reaction	A. It gives reaction of nitrates. B. It gives reaction of Potassium	A. It gives reaction of nitrates. B. It gives reaction of Potassium
Acidity or Alkalinity	NMT 0.5 ml of 0.01 M HCl or 0.01 M NaOH is required to change the color of the indicator.	–
Reducible Substances	The solution does not become blue within 2 min.	–
Chlorides	NMT 20 ppm	NMT 300 ppm
Sulfates	NMT 150 ppm	NMT 1000 ppm
Limit of Nitrite	–	NMT 5 ppm
Heavy metals	–	NMT 20 ppm
Arsenic	–	NMT 3 ppm
Lead	–	NMT 10 ppm
Ammonium	NMT 100 ppm	–
Calcium	NMT 100 ppm	–
Iron	NMT 20 ppm	NMT 10 ppm
Residual Solvents	–	Meets the requirements.
Sodium	NMT 1000 ppm	NMT 1000 ppm
Loss on Drying	NMT 0.5 %	–
Assay	99.0 %-101.1 % (on dried basis)	99.0 %-100.5 %

CAS NO: 7778-77-0

MOLECULAR FORMULA :- KH₂PO₄

MOLECULAR WEIGHT :- 136.10 g/mol

SPECIFICATION	IP	BP	USP
Description		White or almost white powder , crystalline powder , colorless powder or crystalline masses, efflorescent.	White or almost white powder , crystalline powder , colorless powder or crystalline masses, efflorescent.
Appearance of solution		4% w/v Solution is clear and colorless	–
Solubility		Soluble in water , very soluble in boiling water and freely soluble in glycerol.	–
Identification (A) Reaction (B) Reaction (C) Reaction		A. Solution S is faintly acid B. Reaction of Potassium C. Reaction for Phosphates	A. Reaction of Potassium B. Reaction for Phosphates
pH (4% w/v solution in water)		4.2-4.5	–
Sulphate		NMT 50 ppm.	–
Ammonium		NMT10 ppm.	–
Arsenic		NMT 2 ppm.	NMT 3 ppm
Sodium		NMT 1000 ppm	–
Iron		NMT 10 ppm	–
Sulphate		NMT 300 ppm	–
Chloride		NMT 200 ppm	–
Lead		–	NMT 5 ppm
Heavy Metal		–	NMT 20 ppm
Fluoride		–	NMT 10 ppm
Reducing Substances		The colour of permanganate is not completely discharged	–
Residual Solvents		–	Meets the requirement
Organic volatile impurities		–	Meets the requirement
Insoluble substances		–	Max. 0.2%
Loss on Drying at 105⁰C		Max. 2.0%	Max. 1.0%
Assay Na₂B₄O₇,10H₂O		98.0 % – 100.5	98.0 % to 100.5 %

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