ICSC 1362 - 1,2,3-TRIMETHYLBENZENE

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1,2,3-TRIMETHYLBENZENE	ICSC: 1362 (November 2001)
Hemimellitene

CAS #: 526-73-8

UN #: 1993

EC Number: 208-394-8

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

PREVENT GENERATION OF MISTS!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Confusion. Dizziness. Headache. Vomiting. Drowsiness. Cough. Sore throat.	Use 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.	Wear safety spectacles.	First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.
Ingestion		Do not eat, drink, or smoke during work.	Rinse mouth. Do NOT induce vomiting. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Collect leaking and spilled liquid in covered containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 3; UN Pack Group: III
STORAGE
Fireproof. Well closed. Separated from oxidants.
PACKAGING

1,2,3-TRIMETHYLBENZENE

ICSC: 1362

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. Physical dangers Chemical dangers Reacts with oxidants. This generates fire and explosion hazard.	Formula: C₉H₁₂ Molecular mass: 120.2 Boiling point: 176°C Melting point: -25°C Density: 0.89 g/cm³ Solubility in water, g/100ml: 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

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.

Physical dangers

Chemical dangers
Reacts with oxidants. This generates fire and explosion hazard.

Formula: C₉H₁₂
Molecular mass: 120.2
Boiling point: 176°C
Melting point: -25°C
Density: 0.89 g/cm³
Solubility in water, g/100ml: 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

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation. Effects of short-term exposure The substance is irritating to the eyes, skin and 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.	Inhalation risk A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes, skin and 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.

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

Effects of long-term or repeated exposure

OCCUPATIONAL EXPOSURE LIMITS
EU-OEL: 100 mg/m³, 20 ppm as TWA. MAK: 100 mg/m³, 20 ppm; peak limitation category: II(2); pregnancy risk group: C

ENVIRONMENT

NOTES
Use of alcoholic beverages enhances the harmful effect. See ICSCs 1155 and 1389.

ADDITIONAL INFORMATION

EC Classification

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