[Chemical name]: 1,2-di(3-methoxycarbonyl-2-thioureido)benzene

[Molecule  Formula]: C₁₂H₁₄N₄O₄S₂

[Molecule weight]: 342.38

[PROPERTIES]: Pure Topsin is white crystal powder, the technical grade is slightly yellow crystal powder, density 1.5(20°C), melting point 112°C(dissolved under 117-118°C), vapors pressure: 7.12×10^-8mmHg(25°C) Insoluble in water, soluble in acetone, methyl alcohol, chloroform. It's not stable with acid and alkali.

[PACKING]:

1. Technical: Packed in 50kg fibre drum(ø430×700mm).

2.  WP: Packed in 50kg fibre drum(ø430×700mm).

[C A S Number]: 23564-05-8

[Chemical Structure]:

[Quality standard]:

1.Technical grade

Items	Tech
Appearance	white crystal powder
Content ,w/w	97%min
Water, w/w	1.0%max
Acidity (calculated as H2SO4),w/w	0.5%max
Insoluble in acetone, w/w	0.5%max

2.Wettable powder

Items	50% WP	70% WP
Appearance	Off-white powder
Content, w/w	50%min	70%min