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Specification:
IS: 5380-1976 (reaffirmed in 1997).
Description: The material is in the form
of small white crystals or crystalline powder,
free from extraneous impurities. It absorbs moisture
from the air but it is not deliquescent.
Appearance of solution: A freshly-prepared
solution of 20g of the material in 100 ml of distilled
water is clear, colourless and free from sediments.
| Characteristics |
Requirements
|
Units |
| Sodium
bromide content, per cent by mass of dried
material, min. |
99
|
|
| Chlorides
(as Cl) |
0.4
|
%,
min |
| Heavy
metals (as Pb) |
0.0005
|
PPM**,
max |
| Iron
(as Fe) |
0.001
|
%,
max |
| Moisture |
1
|
%,
max |
| Iodide
(as I) |
0.01
|
%,
max |
| Bromates
(as BrO3) |
0.001
|
%,
max |
| Sulphates
(as Na2SO4) |
0.03
|
%,
max |
| Matter
insoluble (as calcium, magnesium and ammonium
hydroxide) |
0.3
|
%,
max |
| pH
of 5% aqueous solution |
6.0
to 7.5
|
|
**
PPM
is parts per million; to convert % to PPM, multiply
% into 10,000; 1 PPM is 1/ 10,00,000.
Properties
and storage:
Sodium
bromide absorbs moisture when exposed to the atmosphere.
It should, therefore, be stored in a well-closed
container in a cool, dry place.
Uses: The PQ grade is specially made for
its use in photography.
Packing: 50-kg HM / HDPE drums with polythene
liner.
For
more information about this product or to place
orders, please contact:
Z N Langrana at
znlangrana@tatachemicals.com
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