黑几八干日本女人屄视频,国产麻豆精品一区一区三区,1024你懂的欧美日韩,中国美女操逼一级片网站

Chemical name: 2-Mercaptobenzothiazole
Molecular formula : C₇H₅NS₂
Structure Formula : 

CAS NO:149-30-4 
Quality standard (GB/T11407-2013) 

Item	Top-grade	First grade	Qualified product
Appearance	light yellow or Off-white powder, granular
Initial Melting point, ℃≥	173.0	171.0	170.0
Loss on heat, % ≤	0.30	0.40	0.50
Ash, % ≤	0.30	0.30	0.30
Residue on screen(149um), % ≤	0.0	0.1	0.1

(Note: Residue on screen only for powder) 
Properties: light yellow or Off-white powder, non-toxic, Density 1.42-1.52, Freely soluble in ethyl acetate, acetone, sodium hydroxide as well as the dilute sodium carbonate, soluble in ethanol, very slightly soluble in benzene, and insoluble in water and gasoline with stable storage. 
Application: Vulcanization accelerator for natural and synthetic rubber
Package: plastic woven bag or paper-plastic laminated bag, 25 kg/bag.

  Previous product： Vulcanization accelerator DM (MBTS)