Abbreviation PX
Plant Mizushima Paraxylene Co., Ltd.
Main Applications Terephthalic acid, synthetic resin
Packaging Tank trucks, drums, cans

Identification of Substance

Chemical Formula Figure: Structural formula of p-xylene
Existing Chemical Substance Inventory No. (3)-3
CAS No. 106-42-3
TSCA Listing Listed
EINECS No. 203-396-5

Physical Properties

Appearance Liquid
Color/Odor Colorless/Aromatic odor
Specific Gravity (20°C) 0.861
Boiling Point (°C) 138.4
Melting Point (°C) 13.2
Flash Point (°C) 27.0(tag closed cup)
Vapor Pressure mmHg (°C) 10 (27.3)
Ignition Temperature (°C) 529
Explosive Limit (Vol%) 1.1-7.0
Solubility (25°C)
Soluble in alcohol and ethel

Main Applicable Laws and Regulations

Fire Service Act Hazardous material Category IV, Class II petroleum
Industrial Safety and Health Act Organic solvent Applicable
Displayed material Applicable
Hazardous material Applicable
Poisonous and Deleterious Substances Control Act Poisonous and deleterious substance Applicable
Ship Safety Act Hazardous material Applicable
PRTR Law   Class I Designated Chemical Substance

Health Effects

Acute Toxicity LDLO Oral rat 5000mg/kg
LCLO Inhalation rat 4912ppm/24hr
LCLO Inhalation mouse 3640ppm
Chronic Toxicity In a study conducted in 206 workers whose estimated maximum exposure is 100 ppm or more, neurasthenia-like symptoms and autonomic disorder occurred in 18% and vasomotor disturbance in 14%, and the incidence was 2 to 4 times higher in the group of those who worked for 5 years or more than in the group of those who worked for less than 5 years (xylene).
Biodegradability Biodegradability is good.
Fish Toxicity TLm24-96  Goldfish 36.8 ppm
Mutagenicity Not confirmed
Carcinogenicity Not confirmed
Eye and Skin Irritation Irritating to the eye and skin. Repeated contact with the skin can cause dermatitis.

Inquiries Concerning Products

Green Energy & Chemicals Business Sector
High-performance Products Division
SCP Department 
TEL:+81-3-3283-4808 / FAX:+81-3-3214-0930