China 85% Textile Chemical Sodium Hydrosulfite, Find details about China Textile Chemical Sodium Hydrosulfite, Sodium Hydrosulfite from 85% Textile Chemical Sodium Hydrosulfite
Index | Technical Grade | Food Additive | ||
Na2S2O4 | ≥ 90% | ≥ 88% | ≥ 85% | ≥ 88% |
Iron (Fe) | ≤20ppm | ≤ 20ppm | ≤ 20ppm | ≤ 20ppm |
Zinc (Zn) | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm |
solution appearance | clear | clear | clear | clear |
EDTA | / | / | / | qualified |
Arsenic(As) | / | / | / | ≤ 1ppm |
Other heavy metal( As Pb) | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm | ≤ 1ppm |
Formate (As HCHO) | / | / | / | ≤ 0.05% |
water insolubles | ≤ 0.05% | ≤ 0.05% | ≤ 0.05% | / |
Cadmium (Cd) | / | / | / | ≤ 2ppm |
Plumbum (Pb) | / | / | / | ≤ 5ppm |