Appearance：Pale yellow powder
Assay：≥97%
Melting point：≥68°C
Volatiles：≤ 2%
Transmittance：
500nm:≥98%

Appearance：Pale yellow powder
Assay：≥95%
Moisture：≤ 2%
K value：≥21.5

Appearance：Off-white powder
Assay：≥98%
Color：≤8.2

Appearance：Pale yellow powder
Assay：≥98%
Melting point：≥80°C
Volatiles：≤ 0.5%
Single impurity：≤ 0.5%
Total impurity：≤ 2%

Appearance：Off-white powder
Assay：≥98%
Volatiles：≤ 0.5%
Single impurity：≤ 3%
Total impurity：≤ 4.5%
Residual：≤ 3000ppm

Appearance：Pale yellow liquid
Assay：≥98%
Color：≤ 70
Single impurity：≤ 0.5%
Total impurity：≤ 2%

Appearance：Pale yellow liquid
Assay：≥99%
Acid value：≤ 1%
Color：≤ 70

Appearance：Pale yellow powder
Assay：≥99%
Volatiles：≤ 1%
Ash：≤ 0.5%