Item | Index | Measuring method | ||
70% | 28% | |||
Appearance | White to yellowish paste | Colorless to yellowish clear liquid | eye measurement | |
Active matter, % | 70±2 | 28±1 | GB/T 5173-1995 | |
Sodium sulfate, % (relative to 100% active matter ) | 1.5 max. | 1.5 max. | GB/T 6366-1992 | |
Unsulfated matter, % ( relative to 100% active matter) | 2.0 max. | 2.0 max. | ||
PH value (1% a. m.) | 7.0~9.0 | 7.0~8.5 | GB/T 6368-1993 | |
Color, Hazen (5% a. m.) | 20 max. | 10 max. | GB/T 3143-1982 |