FORMULA: Na2S2O3.5H2O
M. W. : 248.18
CAS NO.: 10102-17-7
DESCRIPTION: COLOURLESS COLUMNAR CRYSTALS OR WHITE GRANULAR;
EFFLORESCENT IN WARM AIR, SLIGHTLY DELIQUESCENT IN MOIST AND COLD AIR; THE
TEMPERATURE OF SOLUTION DROPS SHARPLY WHEN DIS-SOLVED IN WATER; SOLUBLE IN
AMMONIA (NH3), INSOLUBLE IN ALCOHOL. SPECIFIC GRAVITY:1.729(17℃);
MELTING POINT:48.45℃.
SPECIFICATIONS:
|
ITEM |
PHOTO |
INDUSTRY |
|
Na2S2O3.5H2O |
99% MIN. |
99.0%MIN. |
|
WATER-INSOLUBLE
MATTERS |
0.01%MAX. |
0.01%MAX. |
|
PH |
6.5-9.5 |
6.0-9.5 |
|
SULFIDE (AS S) |
0.001%MAX. |
0.001%MAX. |
|
IRON (AS Fe) |
0.001%MAX. |
0.001%MAX. |
|
GRANULE SIZE (g
/GRANULE) |
12-16 |
12-16 |
|
CRYSTAL TIMES |
3 |
2 |
USES: USED IN PHOTOGRAPHY, ALSO AS REDUCING AGENT FOR CHEMICAL MANUFACTURE.
IT CAN BE USED IN LEATHER AND TEXTILE INDUSTRIES, ETC.
PACKING: IN PAPER AND PLASTIC LINED BAGS OF 25KGS. NET EACH.
H.S. NO.: 2832.3000