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外觀

Description

a white odourless,slightly deliquescent powder crystals or granules

鑒別試驗

ldentification

Pass test

Pass test

溶解性

Solubility

Freely soluble in water. Insoluble in ethanol or ether

pH值1%水溶液

pH of a 1% solution

4.1—5.0

含量

Content,

%

98.0—103.0
(as dry base)

≥97,(60℃ 1h then
105℃  4h)

P?O ?含量(無水物)

 P?O?Content

%

58.0-60.0
(Anhydrous  basis)

鉛

Lead,

≤mg/kg

4

1

  水不溶物(無水物)

Water insolubles

≤%

0.2

0.2
(Anhydrous  basis)

氟

Fluoride

≤%

0.005

0.001(expressed  as fluorine)

干燥失重

Loss on drying,

1,Anhydrous ≤2.0%
2,Monohydrate:10.0-15.0%;
3,Dihydrate:20.0-25.0%

1,Anhydrous  ≤2.0%,
2,Monohydrate ≤15.0%,
3,Dihydrate ≤25%
(60℃ 1h then 105℃ 4h)

砷

As

≤mg/kg

3

1

鎘

Cadmium

≤mg/kg

-

1

汞

Mercury

≤mg/kg

-

1