INDEXES

GB1886.333-2021

FCC

E 341 (i)

Description

Colorless or white triclinic crystal or powder

white crystals or granules or granular powder

Granular powder or white, deliquescent crystals or granules

Assay %

15.9-17.7( as Ca)

15.9-17.7( as Ca)

≥ 95 (on the dried basis )

P2O5Content(on the anhydrous basis)

-

-

55.5-61.1%

CaO content

-

-

19.0-24.8 %

Identification A

-

white precipitate forms

-

Identification B

-

yellow precipitate of ammonium phosphomolybdate forms

-

Test for calcium

-

-

Passes test

Test for phosphate

-

-

Passes test

Fluorine      ≤

25.0 mg/kg

0.005%

30 mg/kg (expressed as fluorine)

Lead        ≤

2.0 mg/kg

2 mg/kg

1 mg/kg

Arsenic     ≤

3.0 mg/kg

3 mg/kg

1 mg/kg

Cadmium   ≤

-

-

1 mg/kg

Mercury    ≤

-

-

1 mg/kg

Aluminium  ≤

-

-

70 mg/kg (only if added to food for infants and young children)

200 mg/kg (for all uses except food for infants and young children)

Heavy metals(As Pb) ≤ 

10 mg/kg

-

-

Loss on Ignition %

-

-

≤25.0(determined by drying at 105 °C for one hour, then ignite at 800 °C ± 25 °C for 30 minutes)

Loss on Drying %

≤1.0

≤1.0

≤17.5 (105 °C, 4 hours)

Clear grade

Passes test

-

-

Carbonate

Passes test

-

-

Free acid and auxiliary salt

Passes test

-

-