overview

4, 4-Methylenedianiline (also known as MDA, 4, 4’-Methylenebisbenzeneamine, para, para’-Diaminodiphenylmethane, Dianilinomethane, 4, 4’-Diphenylmethanediamine) occurs as pale yellow crystals that darken when exposed to air and is slightly soluble in cold water.

Occupational exposure to MDA is possible through inhalation and dermal contact during its commercial manufacture and use as an intermediate. Acute (short term) health effects include irritation of the skin and eyes, liver damage, jaundice, weakness, abdominal pain, nausea, fever and chills. The chronic effects are unknown.

Common Uses

• Primarily used as an intermediate in the manufacture of polyurethane foams
• Curing agent for epoxy resins and urethane elastomers
• A corrosion preventative for iron
• Anti-oxidant for lubricating oils
• A rubber processing chemical
• Intermediate in manufacture of electrometric fibers (i.e. Spandex)
• In the manufacture of methylene diisocyanate
• Preparation of azo dyes (a large class of commercial dyes)

Moldex^® Solution

Any N100 respirator including 2730N100 Series or the 2360P100, 8940P100 filter or 8990P100 cartridge with 8000 face piece if oil is present. If heat is involved, an 8100 organic vapor with 8940P100 should be used.

OSHA 29CFR1910.1050 has specific guidelines on this substance refer to link below:
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=10081

WARNING: The information contained in this Tech Brief is dated and was accurate to the best of Moldex's knowledge, on the date above. It is not meant to be comprehensive, nor is it intended to be used in place of the warning/use instructions that accompany Moldex respirators. Outside of the USA, check with all applicable and local government regulations.

©2003-2010 Moldex-Metric, Inc. All Rights Reserved.