Test Item

检测项目

Enterprise Standard

企业标准

Characters

性状

White loose powder, a characteristic micro-foul, suck up moisture

白色疏松粉末，有特征性微臭，有吸湿性

PH value

PH值

2.5-3.5

Viscosity

粘度（0.2%W/V）

4000-11000

Identification

鉴别

After neutralizing, a very viscous gel is produced

中和，呈凝胶状

Loss on drying

干燥失重

≤2.0%

Assay(COOH content)

COOH含量测定

56.0~68.0%