Substituting 2,2'-dichloro-4,4'-methylenedianiline (MOCA) in polyurethanes manufacturing

One of the goals of the European REACH regulation is the progressive replacement of substances of very high concern (e.g. carcinogens) by safer alternatives. Companies that use these substances, actively search for safer alternatives (less dangerous substances, new technologies and processes), and report about these alternatives. Below you will find the information on possible alternatives for chromium trioxide, included in the different applications for authorisation received so far by ECHA. To obtain further details, please follow the link to the full dossier.

Below you can find possible alternatives for 2,2′-dichloro-4,4′-methylenedianiline (MOCA) in polyurethanes manufacturing.

2,2′-dichloro-4,4′-methylenedianiline (MOCA)

EC-number: 202-918-9
CAS-number: 101-14-4
Use: Manufacture of polyurethane products
Technical function: Curing agent/Chain extender

Most promising alternative:

Combinations of the shortlisted alternatives

Other Alternatives:
Different (groups of) companies have researched possible alternatives to replace chromium trioxide. Even if these alternatives may not have been chosen for their particular case, they may still be an appropriate option for other cases.

4,4’-diphenylmethane diisocyanate
1,5-naphthalene diisocyanate
1,4-Phenylene diisocyanate
6-methyl-2,4-bis(methylthio)phenylene-1,3-diamine; 2-methyl-4,6-bis(methylthio)phenylene-1,3-diamine
2-methylpropyl-3,5-diamino-4-chloro benzoate
4-[(4-amino-2-chloro-3,5-diethylphenyl)methyl]-3-chloro-2,6-diethylaniline
ethane-1,2-diol and 3-aminomethyl-3,5,5-trimethylcyclohexylamine
2,2′-p-phenylenedioxydiethanol
butane-1,4-diol
TDI prepolymers in combination with DMTDA and M-CDEA
MDI prepolymers in combination with BDO and HQEE

More detailed information

All research efforts by companies have been documented in reports. The following ECHA-dossiers are available about possible alternatives for chromium trioxide for ECCS: