Products Catalog
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TEL:+86-20-29813152
Web:http://http://www.m.cqdongrui.com.cn
E-mail:cpcc@pigeonchem.com
Address:ROOM 1605,HO KING COMMERCIAL CENTER,2-16 FA YUEN STREET,MONGKOK,KOWLOON,HONG KONG
品質(zhì)標(biāo)準(zhǔn)
Quality standard
|
項目 ITERMS |
優(yōu)等品 SPECIAL GRADE |
一等品 FIRST GRADE |
|
七水硫酸亞鐵含量 % FeSO4·7H2O content |
≥98.0 |
≥90.0 |
|
鐵含量 % Iron content |
≥19.0 |
≥19.0 |
|
鉛含量 % Lead content |
≤0.002 |
≤0.002 |
|
砷含量 % Arsenic content |
≤0.0002 |
—— |
|
鎘含量 % Cadmium content |
≤0.0005 |
—— |
|
PH值 PH-Value |
≥2.5 |
—— |
|
水不溶物 % Water insoluble |
≤0.2 |
—— |
|
外觀 Appearance |
淺綠色晶體 Light green crystal |
淺綠色晶體 Light green crystal |