appearance

White powder , taste bitter ,without stink

Specific optical rotation

+59 ° ~+62 °

Melting point

200 °C ~ 204°C

Moisture

≤ 1.0 %

Blazing residue

≤ 0.2 %

Heavy mental

≤ 20ppm

Assay (titration )

≥ 98.5 %