Test   Item

Specification

Characteristic

Clean odorless, fine white powder

2.A

Identification(Carbonate, CO32-)

Effervesce with acids, evolving a colorless gas that when passed into Ca(OH)2, produces a white precipitate.

2.B

Identification(Calcium salt, Ca2+)

Moistened with HCL, impact a transient yellowish red color to a nonluminous flame

3.

Acid insoluble % ≤                                      

0.2

4.

Loss on drying % ≤                                     

0.5

5.

Barium salt

No green flame

6.

Magnesium and alkali metals % ≤          

1.0

7.

Iron % ≤                                                         

0.04

8.

Heavy metals % ≤                                       

0.002

9.

Arsenic salt % ≤                                          

0.0003

10.

Fluoride % ≤                                                 

0.005

11.

Lead % ≤                                                        

0.0003

12.

Mercury % ≤                                                  

0.00005

13.

CaCO3 Content (Dry basis) %              

98.0-100.5