Item

Standard

Appearance (≥25℃)

Colorless or pale yellow clear liquid,

No visible impurities

Assay

≥99.0%

Moisture

≤0.30%

Color

≤30 Hazen (Pt-Co)

Refractive index n_D²⁵

1.4820~1.4860

Item

Standard

Assay

99.5% min

Gamma-butyrolactone

0.5% max

Butoane-1,4-diol

0.4% max

Moisture

0.3% max

Iron

10 PPM max

Heavy metals

20 PPM max

Color

40 APHA max

Density

1.107~1.115