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Meta-Phenylenediamine (MPD) is an off-white to tan cast solid or a clear liquid that tends to darken on storage. It is sensitive to air, light and moisture, the presence of which will tend to hasten discoloration.

Specification :

Property	Specification	Test Method
meta-Phenylenediamine	99.5% min	G.C.
Other phenylene diamine isomers	0.4% max	G.C.
Moisture content	0.1% max	G.C.
Nitro compounds as dinitrobenzene	0.1% max	G.C.

Physical Properties :

CAS Reg. No.	108-45-2
Empirical Formula	C6H8N2
Molecular Weight	108.1
Boiling Point	283°C/541°F
Specific Gravity @ 15°C @ 75°C	1.139 1.10
Vapor Pressure mmHg @ 25°C @ 100°C	0.001765 0.6224
Solubility in Water, wt. %(25°C)	35.1
Flash Point, TOC	138°C/280°F
Freezing Point	63°C/145°F