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di-SODIUM HYDROGEN CITRATE SESQUIHYDRATE Extra Pure

Confirms to BP
Citric acid disodium salt, Sodium citrate dibasic

COAs

Packings

500 g (00500)

1PW1200500
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Article No. 05896 Grade Extra Pure
Purity 98% CAS No. 144-33-2
Molecular Formula Na2H6C6O7.11/2H2O Molecular Weight 263.11
H.S. Code 2918.1540 Shelf Life 60 Months

Physical Properties

Physical state at 20 °C Solid Colour White crystalline
Odour Odorless pH value 4.5 - 5.5 at 263.1 g/l at 25 °C
Melting point/ Freezing point [°C] 149 °C Solubility in water [% weight] 263.1 g/l at 20 °C

Specifications

Appearance White crystalline powder Assay (as C6H6Na2O7.1½ H2O) 98.0 - 104.0%
Solubility Freely soluble in water & practically Insoluble in methanol Identification: Sodium -
Identification 'A' i. No precipitate should be formed upon addition of potassium carbonate solution to sample solution and heat to boiling. ii. A dense white precipitate should be formed. Identification 'B' i. A voluminous, white crystalline precipitate should be formed. ii. No precipitate should be formed
Identification: Citrates - Identification 'A' A violet colour should be produced upon addition of excess of concentrated ammonia and it turns to violet-blue.
Identification 'B' No precipitate should be formed with addition of calcium chloride solution. A white precipitate should be produced after boiling of above solution and it should be soluble in 6M acetic acid. Acidity pH of 3% w/v solution in water is between 4.9 to 5.2
Arsenic Maximum 2 ppm Chloride (Cl) Maximum 330 ppm
Oxalate (as anhydrous oxalic acid) Maximum 150 ppm Sulphate (SO4) Maximum 0.12%
Readily carbonisable substance Not more than a pale brown colour should be produced
Revision Date: 01-Jul-2026

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