Methyltetrahydrophthalic Anhydride

Product details

Methyltetrahydrophthalic Anhydride (MTHPA) is being produced by Maleic Anhydride reacting with Isoprene.

CAS-No. 26590-20-5
EINECS-No. 247-830-1

Synonym: 1,2,3,6-Tetrahydromethylphthalic Anhydride
Uses/applications: Hardener for Epoxy Resins


Product CodeQualityPacking UnitSpec SheetInquiry
12115 Standard 220 kgs drums PDF Symbol Contact
12116 Standard 1.100 kgs IBC PDF Symbol Contact

MSDS according 91/155 EEC (2001/58 EC)


More information

Information pertaining to particular dangers for man and environment:
R 41 Risk of serious damage to eyes.
R 42/43 May cause sensitisation by inhalation and skin contact.

Classification system for Methyltetrahydrophthalic Anhydride (MTHPA):
The classification was made according to the latest editions of the EU-lists, and expanded using company data and specialized literature.
Chemical characterization for Methyltetrahydrophthalic Anhydride (MTHPA), 1,2,3,6-Tetrahydromethylphthalic Anhydride:
CAS No. Description: 26590-20-5 1,2,3,6-tetrahydromethylphthalic anhydride

Identification number(s):
EINECS Number: 247-830-1
EU Number:
General Information
for Methyltetrahydrophthalic Anhydride (MTHPA), 1,2,3,6-Tetrahydromethylphthalic Anhydride
Form: Fluid
Colour: slightly yellowish, Brownish
Odour: Pungent

Change in condition
Melting point/Melting range: undetermined
Boiling point/Boiling range:
Flash point:
100°C (closed cup)
Ignition temperature: 475°C
Danger of explosion: Product does not present an explosion hazard.
Density at 20°C:
1.195 g/cm³

Solubility in / Miscibility

Slightly soluble
Land transport ADR/RID (cross-border) for Methyltetrahydrophthalic Anhydride (MTHPA):
No hazardous good according to the regulation.

Maritime transport IMDG:
IMDG Class: No hazardous good according to the regulation.

Air transport ICAO-TI and IATA-DGR:
ICAO/IATA Class: No hazardous good according to the regulation.
Markings according to EC guidelines for Methyltetrahydrophthalic Anhydride (MTHPA):
The product has been classified and marked in accordance with EU Directives / Ordinance on Hazardous Materials

Risk phrases:
41 Risk of serious damage to eyes.
42/43 May cause sensitisation by inhalation and skin contact.

Safety phrases:
22 Do not breathe dust.
24 Avoid contact with skin.
26 In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
37/39 Wear suitable gloves and eye/face protection.

National regulations:

Information about limitation of use:
Restrictions on juvenile employment must be observed.
Employment restrictions concerning pregnant and lactating women must be observed.

Technical guidance (air):
Class Share in %
I              100.0

Water hazard class: Water hazard class 2 (Self-assessment): hazardous for water.

Hazard description

Hazard description

Hazadous material sign

Xi Irritant