Appearance

White flake appearance, color may darken during storage

White flakes

Initial melting point of dry product,℃

≥108.5

109.10

Resorcinol content

(Chemical method),%

≥99

99.33

Resorcinol content

(HPLC),%

≥98

99.95

Hydroquinone content,%

≤0.05

0.001

Catechol content,%

≤0.05

ND

Phenol content,%

≤0.05

ND

Crystallization point,℃

≥109

109.56

Water,%

≤1.0

0.020

Ash,%

≤1.0

0.001