Sodium Citrate (Trisodium Citrate) Chemical Formula


Description

Sodium Citrate is mainly used as an expectorant and a urine alkanizer. It is also used as a pharmaceutical aid and as a food additive in Dairy Industries which cater in Cheese Manufacturing and Beverages. It is also a water treatment chemical and as a Laboratory Reagent.

Applications and Effects

Our product helps in the storage of all the Dairy products especially cheese. It can prevent the dairy products from getting stale for 90 days than compared to other solutions. If it is used in water then can prevent the growth of bacteria for 15 days.

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Specifications

Tests Specifications

Description

Colorless crystals or white, crystalline powder.

Solubility

Freely soluble in water and very soluble in boiling water. Insoluble in alcohol.

Identification

A) solution (1 in 20) responds to the test for Sodium and for citrate.
Sodium: A dense precipitate is formed.
Citrate: A light red colour is produced.

Alkalinity

No pink colour is produced by 1 drop of phenolphthalein TS.

Water

Between 10.0% and 13.0%. Dry it at 180°C for 18 hours.

alkalinity

Not more than 0.2 ml of 0.1M hydrochloric acid or 0.1M sodium Hydroxide is required to change the colour of the indicator.

Tartrate

No crystalline precipitate is formed.

Heavy metals

Not more than 0.001%.

Assay

99.0 % to 100.5 % (On Anhydrous Basis)

Tests Specifications

Appearance

White or almost white, crystalline powder or white or almost white, granular crystals, slightly deliquescent in moist air.

Solubility

Freely soluble in water, practically insoluble in ethanol (96 %).

Identification
(A) Citrates

A) Violet colour, turning to violet-blue is produced.
B) A white precipitate soluble in 6M acetic acid.

(B) Sodium

A) A dense, white precipitate is formed.

Appearance of solution

Solution S is clear and colourless.

Acidity or alkalinity

Not more than 0.2 ml of 0.1M hydrochloric acid or 0.1M sodium Hydroxide is required to change the colour of the indicator.

Readily carbonisable
Substances

The solution is not more intensely coloured than reference
solution Y2 or GY2.

Chloride

Not more than 50 ppm

Oxalate

Not more than 300 ppm (calculated as anhydrous oxalic acid).

Sulphate

Not more than 150 ppm

Heavy metals

Not more than 10 ppm

Water

11.0 per cent to 13.0 per cent, determined on 0.300 g.

Assay

99.0 % to 101.0 % (On Anhydrous Basis)

TESTS SPECIFICATIONS

Description

White, granular crystals or white crystalline powder; odourless; Slightly deliquescent in moist air.

Solubility

Freely soluble in water; practically insoluble in ethanol (95%) and in ether.

Identification
(A) Sodium Salts

  1. A dense, white precipitate is formed.
  2. A yellow, crystalline precipitate is formed.

(B) Citrates

  1. A white precipitate soluble in 6M acetic acid.

Appearance of solution

Solution A is clear and colourless.

Acidity or alkalinity

Not more than 0.5 ml of 0.05M sulphuric acid or 0.1M sodium Hydroxide is required.

Arsenic

Not more than 2 ppm

Heavy metals

Not more than 10 ppm

Chloride

Not more than 100 ppm

Oxalate

Not more than 300 ppm (calculated as anhydrous oxalic acid).

Sulphate

Not more than 150 ppm

Tartrate

No crystalline precipitate is formed.

Readily Carbonisable
Substances

The solution is not more intensely coloured than reference
Solution YS2 or GYS2.

Water

11.0 to 13.0 per cent, determined on 0.3 g.

Assay

99.0 % to 101.0 % (On Anhydrous Basis)