ICSC 1362 - 1,2,3-TRIMETHYLBENZENE

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

1,2,3-TRIMETHYLBENZENE

ICSC: 1362
_{March 2001}

Hemimellitene

CAS No: 526-73-8
RTECS No: DC3300000
UN No: 1993

C₉H₁₂
Molecular mass: 120.2

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRST AID / FIRE FIGHTING
FIRE	Flammable.	NO open flames, NO sparks, and NO smoking.	Alcohol-resistant foam, foam, powder, carbon dioxide.
EXPLOSION	Above 44°C explosive vapour/air mixtures may be formed.	Above 44°C use a closed system, ventilation, and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).	In case of fire: keep drums, etc., cool by spraying with water.

EXPOSURE		PREVENT GENERATION OF MISTS!
Inhalation	Confusion. Dizziness. Headache. Vomiting. Drowsiness. Cough. Sore throat.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness.	Protective gloves.	Rinse skin with plenty of water or shower.
Eyes	Redness. Pain.	Safety spectacles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Collect leaking liquid in covered containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer.	UN Hazard Class: 3 UN Pack Group: III

EMERGENCY RESPONSE	SAFE STORAGE
Transport Emergency Card: TEC (R)-30GF1-III NFPA Code: H0; F2; R0	Fireproof. Well closed. Separated from oxidants.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

Chemical dangers
Reacts with oxidants causing fire and explosion hazard.

Occupational exposure limits
TLV: 25 ppm as TWA; (ACGIH 2004).
MAK: 20 ppm, 100 mg/m³; Peak limitation category: II(2); Pregnancy risk group: C; (DFG 2004).

Routes of exposure
The substance can be absorbed into the body by inhalation.

Inhalation risk
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C.

Effects of short-term exposure
The substance is irritating to the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system. If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: 176°C Melting point: -25°C Density: 0.89 g/cm³ Solubility in water, g/100 ml: 0.005 Vapour pressure, kPa at 20°C: 0.18 Relative vapour density (air = 1): 4.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01 Flash point: 44°C Auto-ignition temperature: 470°C Explosive limits, vol% in air: 0.8-6.6 Octanol/water partition coefficient as log Pow: 3.7

NOTES

Use of alcoholic beverages enhances the harmful effect.
See also ICSC1155 Mesitylene, 1389 Trimethyl benzene (mixed isomers).
Card has been partly updated in April 2005. See sections Occupational Exposure Limits, Emergency Response.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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