尤物a∨视频在线观看_欧美俄罗斯乱妇_人妻少妇屁股翘水多视频_97国产精品系列在线观看

Product name：1,8-Naphthalic anhydride

CAS NO.: 81-84-5

Content：≥99%

Molecular formula：C₁₂H₆O₃

Molecular weight：198.17

Structural formula：

Physical and chemical properties: Appearance: light yellow powder; 267-269Melting point°C；

Uses: It is an important raw material for the synthesis of perylene dyes, pigments and fluorescent brighteners.

Packing：20KG/ bag