Chemical Formula    :         CaHPO₄.2H₂O              CAS No.        :       7757-77-7

Mol. Weight               :         172.09

S.No

STANDARDS

SPECIFICATION

1

Colour

Snow White Colour – Equal to STD

2

Odour

Odourless

3

Texture

Fine Powder, free of grit

4

Fineness : 325 Mesh  (45 Micron)

                : 200 Mesh (75 Micron)

Min. 99.5% To Pass thru

Min. 99.9%           “     

5

Taste

Tasteless

6

Bulk Density

0.75 to 1.00 gm/cc

7

Insoluble in Dil. HCl

0.1% Max.

8

pH of 20% Slurry

6.8 to 7.8

9

Carbonate

Absent

10

Iron as Fe

50 PPM Max.

11

Chloride

0.3% Max.

12

Sulphate

0.24% Max.

13

Barium

To pass test

14

Fluoride as (F)

100 PPM Max.

15

Arsenic as AS₂0₃

2 ppm Max.

16

Heavy Metals

20 ppm Max.

17

Set Test

Must  pass test

18

Phosphate as P₂O₅

40.5 to 42.5%

19

Loss on drying at 60 Deg.C.

1.0% Max.

20

Loss on Ignition at 800 Deg. C

24.50 to 26.5%

21

Moisture (Xylol Distillation)

15 % to 21%

22

Purity as  Titration Value

58.0 ml to 61.0 ml.

23

Assay

98 – 105%

Microbial Tests :

01

Total Bacterial Count

100 cfu/gm Max.

02

Moulds / Yeasts

100 cfu/gm Max.

03

Gram Negative Bacilli

10 cfu/gm Max.