含量(无水物)

Assay

%

34.0-40.0(as Ca)

≥90(On the ignited basis)

34.0-40.0 (as Ca)

P2O5含量(无水物)

P2O5 Content

%

--

38.5--48.0 (Anhydrous basis)

--

外观

Description

a white, odourless powder which is stable in air

鉴别试验

Identification

Pass test

Pass test

Pass test

水溶物质

Water-soluble substance

≤%

--

--

0.5

酸不溶物

Acid-insoluble substance

≤%

--

--

0.2

碳酸盐

Carbonate

--

--

Pass test

氯

Chloride

≤%

--

--

0.14

硫酸盐

Sulfate

≤%

--

--

0.8

二基盐和钙氧化物

Dibasic salt and calcium oxide

--

--

Pass test

溶解测试

Solubility tests

--

Practically insoluble in water, insoluble in ethanol soluble in dilute hydrochloric and nitric acid

--

砷

Arsenic ,

≤mg/kg

3

1

3

钡

Barium

--

--

Pass test

氟

Fluoride

≤mg/kg

75

50(expressed as fluorine)

75

硝酸盐

Nitrate

--

--

Pass test

重金属

Heavy metals

≤mg/kg

--

--

30

铅

Lead

≤mg/kg

2

1

--

镉

Cadmium

≤mg/kg

--

1

--

汞

Mercury

≤mg/kg

--

1

--

灼烧失重

Loss on ignition

≤%

10

8.0(800℃±25℃，0.5h)

8.0 (800℃,0.5h)

铝

Aluminium

--

Not more than 150 mg/kg (only if added to food for infants and young children) Not more than 500 mg/kg (for all uses except food for infants and young children). This applies until 31 March 2015 Not more than 200 mg/kg (for all uses except food for infants and young children). This applies from 1 April 2015.

--