Sodium phosphate monobasic anhydrous

SKU:
TC459M
CAS Number : 7558-80-7
Molecular Formula : NaH₂PO₄
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Product Description

Molecular weight 119.98
Molecular formula NaH2PO4
CAS No. 7558-80-7

Quality Control

Appearance (USP) Colorless crystals, or white crystalline powder, slightly deliquescent
Appearance (BP) White slightly deliquescent crystals or granules
Appearance (IP) A white powder or colourless crystals
Solubility (USP) Freely soluble in water, practically insoluble in alcohol
Solubility (BP) Very soluble in water, very slightly soluble in ethanol (96%)
Solubility (IP) Very soluble in water, very slightly soluble in ethanol
Identification A : Sodium (USP) Meets the requirements
Identification A (BP) 10% solution in water is faintly acid
Identification A (IP) Reactions for phosphates
Identification B: Phosphate (USP) Meets the requirements
Identification B (BP) 10% solution in water yields the reaction characteristics of phosphates
Identification B (IP) Reactions for sodium salts
Identification C (BP) 10% solution in water neutralize with 10% w/v solution of potassium hydroxide yields reaction A characteristics of sodium salts
Identification D: Loss on drying (BP) <= 1.0% (at 130°C to constant weight)
pH (5% in water at 25°C) (USP, IP) 4.1 - 4.5
Clarity and color of solution (BP) 10% solution in water is clear and colorless
Acidity: pH (BP) 4.2 - 4.5 (mixture of 5 mL of solution S and 5 mL of water)
Chloride (USP, IP) <= 0.014%
Chloride (BP) <= 0.02%
Sulfates (USP, IP) <= 0.15%
Sulfate (BP) <= 0.03%
Iron (BP) <= 0.001%
Insoluble substances (USP, IP) <= 0.2%
Arsenic (USP, IP) <= 0.0008%
Arsenic (BP) <= 0.0002%
Reducing substances (BP) The solution retains a slight red colour
Aluminium, Calcium, and related elements (USP, IP) The sample solution does not become turbid when rendered slightly alkaline to litmus paper with 6N ammonium hydroxide
Heavy metals (IP) <= 0.002%
Water (K.F.) (USP, IP) <= 2.0%
Loss on drying (BP) <= 1.0% (at 130°C to constant weight)
Assay (NaOH T, on anhydrous basis) (USP, IP) 98.0 - 103.0%
Assay (NaOH T, dried substance) (BP) 98.0 - 100.5%

Storage and Shelf Life

Storage Condition Store below 30°C away from bright light.
Shelf life 48 months.
CAS Number : 7558-80-7
Molecular Formula : NaH₂PO₄
More Information
Product Name Sodium phosphate monobasic anhydrous
SKU TC459M
CAS No 7558-80-7
EC No. 231-449-2
Molecular formula NaH₂PO₄
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