Chengdu Weijing Xiwang Fine Chemical Industrial Co.,Ltd.

High purity di-2,5 (DBPH-99)

CAS#：

78-63-7

Commercial Name：

Wjs-99 type di-25, Weijng101-99, curing agent DBPH-99

Chemical Name：

2,5-Dimethyl-2,5-di(tert-butyl peroxy)hexane

Structural Formula：

Molecular Formula：

C16H34O4

Molecular weight：

290.45

Physical Characteristics：

light yellow transparent liquid, has no irritant smell, not poisonous, soluble in alcohol, esters, ethers, ketones and most of organic solvents. doesn't dissolve in water. Boiling point 50 —52 ℃(13Pa) . Melting point 8℃. Decomposition temperature 145—150 ℃. Viscosity7.8Mpa.s. Refractive
index (20℃ ) 1.424—1.425。Density (20 ℃ )0.873 —0.876 g/cm3。Active Oxygen content 10.9%。Half-life(0.1mol/ in benzene): 10 hours/ 122 ℃ ， 1hour/ 143 ℃ ， 1minute/ 192 ℃. Extremely explosive in presence of open flames and sparks.

Quality Index：

Specifications(grade)	Wjs-99型
2,5-dimethyl-2,5-di(t-butylperoxy)hexane content：	98—99.5 %
3,3,6,6-tetramethyl-1,2-dioxyacyclohexane content:	≤1%
Di-tert-butylperoxide content:	≤0.2%
Flavour :	has no irritant smell
Appearance:	light yellow liquid

Safe data：

flash point (Closed-cup) 43℃.SADT 85℃.Tem 75℃。UN-No 3105 .

Usage：

It is the effective high temperature curing agent for vinyl silicon rubber, crosslinker for polyethylene rubber and ethylene-propylene rubber, can increase the tensile strength and the hardness of the product , but the rate of elongation and the compression deflection is low. The smell after vulcanization is the slightest in most of the alkyl peroxide. It can be feed into rubber materials at the mixing procedure.

Package, storage and carriage：

packed in plastic bucket, net weight of each bucket is 20—50kgs,or packed according to client's demands. Store and carry as organic peroxide. Recommended storage temperature 10—30℃.Storage stability as from date of delivery 6 months.
It is a product of “New method to produce high purity di-2,5 ”, which is a technique innovation project in 2002 of National Technological Department. It has high purity, tiny admixture. See the chromatogram map of the product.

Chromatogram map of the product：