Hydrated Lime

Test and Method

Specification

Identification A (EP)

On addition of a further 6 mL of 1 M hydrochloric acid and triturating, the solution becomes colourless

Identification B (EP)

Dissolve about 0.1 g in dilute hydrochloric acid R and dilute to 10 mL with water R. 5 mL of the solution give reaction (b)of calcium.

Identification A (JP)

Mix Calcium Hydroxide with 3 to 4 times its mass of water: the mixture is slushy and is alkaline.

Identification B (JP)

Dissolve 1 g of Calcium Hydroxide in 30 mL of dilute acetic acid, and boil. After cooling, neutralize with ammonia TS: the solution responds to the Qualitative tests (2) and (3) for calcium salt.

Solubility(BP)

Slightly soluble in water insoluble in ethanol soluble in glycerol.

Solubility(EP)

Practically insoluble in water

Solubility(JP)

It is practically insoluble in water, in ethanol (95) and in diethyl ether. It dissolves in dilute acetic acid, in dilute hydrochloric acid and in dilute nitric acid.

Acid Soluble substance(JP)

NMT 25mg

carbonate(EP)

NMT 5.0 %

Chloride (EP)

NMT 330 ppm

Sulfates (EP)

NMT 0.4%

Loss on drying(BP)

NMT 2%

Barium (BP)

NMT 0.03%

Fluoride (BP)

NMT 50 mg/kg

Magnesium and alkali salts(BP)

1.00%

Magnesium and alkali metals(JP)

mass of the residue does not exceed 24 mg.

Arsenic (BP)

NMT 3 ppm

Acid-soluble substances (JP)

 NMT 25 mg

Heavy metals(EP)

NMT 200 ppm

Heavy metals As Pb(JP)

NMT 40ppm

Assay (BP)

NMT 92.0%

ASSAY (EP)

NLT 95.0- 100.5   %

ASSAY(JP)

NLT  90.0%