V-601HP is a non-nitrile azo initiator having a high decomposition temperature. It is freely soluble in various organic solvents and has a 10 hour half-life decomposition temperature of 66° C.

This High Purity (HP) grade is a metal content controlled product which is suitable for the semiconductor and LCD production.

Chemical Name


CAS No.: 2589−57−3
Molecular weight: 230.26

Physical characteristics

Appearance Slightly yellow or light yellow crystals or oily liquid
Melting/freezing point 22-28° C
10 hour half-time decomposition temperature 66° C in toluene
Activation energy 131.2 KJ/mol K
Frequency factor (ln A) 35.67
Solubility Freely soluble in benzene, ethanol, N,N-dimethylformamide, Dioxane, and DMSO
Soluble in methanol, toluene, chloroform, hexane and acid
Insoluble in water
Self-accelerating decomposition temperature (SADT) 35° C
Metal content Na: 200 ppb or less
Li, Mg, AI, K, Ca, Cr, Mn, Fe, Ni, Cu, Zn, Zr, Pb, Sn: 100 ppb or less

Main Applications

  • Semiconductors and LCD applications


  • EINECS No.: 219-976-6
  • REACH: n/a


Store under 10° C in a well-ventilated position. Protect from heat and direct sunlight. Do not seal container gastight. Store only in the original container.

Safety information

Health Hazard
Serious Health Hazard

For specific information on the safe handling of the product, please refer to the material safety data sheet (MSDS) which is available on request.