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Description and features

Iniper 44 (AIBI / 2,2’-Azobis(2-(2-imidazolin-2-yl) propane)dihydrochloride) is a white crystal powder which has C12H24C12N6 as chemical formula.
It is an watersoluble azo-initiator which is used in flocculants, super absorbent polymers and finishing agents for textile and wool.

Iniper 44 (AIBI) is also known as 1,2-Bis(2-(4,5-dihydro-1H-imidazol-2-yl)propan-2-yl)diazene dihydrochloride.


Europe: Iniper 44 (2,2’-Azobis(2-(2-imidazolin-2-yl) propane)dihydrochloride) is limited ➔ on stock. Our lead time is about one week if delivered in 20 KG carton boxes.

Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

➔ Limited available in the European Union as this product has not been REACH registered (yet).

Product Identification

CAS number27776-21-2
EC number 248-655-3
HS code2927 00 00


AppearanceWhite crystal powder
Assay≥98.0 %
Volatility≤ 1.0 %


Iniper 44 (2,2’-Azobis(2-(2-imidazolin-2-yl) propane)dihydrochloride) can be used for the following applications:

  • Polymerization of acrylonitrile
  • Polymerization of acrylamide
  • Polymerization acrylic acid


Available packaging: 20 KG carton boxes.
Special packaging is available on request.


2,2’-Azobis(2-(2-imidazolin-2-yl) propane)dihydrochloride in a cool, dry and well-ventilated area and in line with legal requirements at maximum 40 °C.
Keep away from heat sources, ignition sources.


A Material Safety Data Sheets (MSDS) is available for Iniper 44 and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formula C12H24Cl2N6
Molecular weight 323.27 g/mol
Smiles notation CC(C)(C1=NCCN1)N=NC(C)(C)C2=NCCN2.Cl.Cl
Structural formula

Physicochemical information

Boiling point Decomposes before boiling
Relative density 1.303 g/ml @ 20 °C
SADT140 °C
Melting point No melting point
Partition coefficient (log Pow) -3.5 @ 20 °C
Solubility in water 200 g/L @ 20 °C
Vapor pressure 0.001 Pa @ 50 °C
2,2’-Azobis(2-(2-imidazolin-2-yl) propane)dihydrochloride | CAS: 27776-21-2 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.