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Description and features
Iniper MAI (Dimethyl 2,2′-azobis(2-methylpropionate)) is an white solid which has C10H18N2O4 as chemical formula. Iniper MAI is used as polymerization in the production of polyols and polyester polyols, it is a non-nitrile azo-initiator which is soluble in a wide variety of organic solvents.

This substance is also known as 2,2-Azobisisobutyric acid dimethyl ester and Dimethyl 2,2′-(diazene-1,2-diyl)bis(2-methylpropanoate).

Product information

CAS number2589-57-3
EC number 219-976-6
HS code2927 00 00

Molecular and structural information

Molecular formulaC10H18N2O4
Molecular weight230.26 g/mol
Smiles notationCC(C)(C(=O)OC)N=NC(C)(C)C(=O)OC
Structural formula:2589-57-3


AppearanceLight yellow or dark-white crystal granules
Assay≥98.00 %
Gas number, cm3/g≥93
Dissolve in methanolClarity or near to clarity
Water≤1.00 %
Fe≤ 500 ppm
MMA (HPLC)≤0.80 %
pH≤5.00 %

Physicochemical information

Density1.060 kg/m3
Melting point22~28 °C
Partition coefficient (log Pow)1.34 @ 20 °C
Solubility in waterInsoluble
Vapour pressure0.0244 mmHg @ 25 °C

Iniper MAI (Dimethyl 2,2-azobis(2-methylpropionate)) is used in polyols & polymer polyols.

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

Shipment Info
Iniper MAI ( Dimethyl 2,2′-azobis(2-methylpropionate) is on stock in Europa. Our lead time is about one week if delivered in 20KG carton boxes.

Store Dimethyl 2,2′-azobis(2-methylpropionate) (MAI) in a cool, dry and well-ventilated area and in line with legal requirements at maximum 10 °C.
Keep away from heat sources, ignition sources. Do not seal container gastight

This substance (CAS: 2589-57-3) has been pre-registered under REACH (EC) 1907/2006.

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

Dimethyl 2,2′-azobis(2-methylpropionate) | MAI (CAS: 2589-57-3). This information is supplied solely for informational purposes and Vesta Intracon 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.