又硬又粗进去好疼A片麻豆,熟妇人妻久久中文字幕,国产精品久久久久av福利动漫,五十路熟妇亲子交尾

[Product name]:

β-Propiolactone;
beta-propiolactone;
oxetan-2-one

[Structural Formula]:

[Molecular Formula]:

C₃H₄O₂

[Molecular Weight]:

72.0627

[CAS NO]:

57-57-8

[Packing]:

Properties

Appearance

Colorless liquid

Boiling range °C

161-163

Quality Specifications

Purity%

≥97.0

Moisture %

? ≤0.5