Products Catalog
Contact Us
TEL:+86-20-29813152
Web:http://http://www.cpcc.hk.cn
E-mail:cpcc@pigeonchem.com
Address:ROOM 1605,HO KING COMMERCIAL CENTER,2-16 FA YUEN STREET,MONGKOK,KOWLOON,HONG KONG
品質標準
Quality standard
|
項目 Item |
指標 |
||
|
優等品 Premium Grade |
一等品 First grade |
合格品 Qualified product |
|
|
主含量（以Na2S2O） Main content (as Na2S2O) |
96.0 |
94.0 |
92.5 |
|
鐵（Fe）含量 % Ferrum (as Fe) |
≤0.005 |
≤0.010 |
≤0.015 |
|
水不溶物含量 % Water insoluble |
≤0.05 |
≤0.05 |
≤0.10 |
|
砷（As）含量 % Arsenic |
≤0.0001 |
-- |
-- |