Dust entry

Methyltetrahydrophthalic anhydride dust

Airborne methyltetrahydrophthalic anhydride particulate encountered in epoxy-resin and specialty-plastics production.

Airborne form

dust

The form describes what is suspended in air at the point of exposure. A material can produce more than one form, such as dust during handling and fume during heating.

Health effects

occupational asthma concernrespiratory sensitizationrhinitis concerneye, skin, and respiratory-mucosa irritation concern

Evidence

The UK HSE review reports occupational-asthma evidence for methyltetrahydrophthalic anhydride, including exposure-related asthma and rhinitis, and classifies it as a respiratory sensitiser under its reviewed criteria.

Source: pdf ↗ · saved source
page 57 · C18: METHYL-TETRAHYDROPHTHALIC ANHYDRIDE — Summary and conclusion · 1

Several studies on methyltetrahydrophthalic anhydride (MTHPA) indicate that it can induce occupational asthma, although the findings of the available bronchial challenge tests are of limited value. Immunological data suggest an allergic mechanism for induction of the asthma.

Controls

enclose epoxy-resin powder handling
use local exhaust ventilation
avoid generating airborne particulate
protect skin and eyes
use appropriate respiratory protection where exposure assessment indicates it is needed