ICSC 0323 - PYRIDINE

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PYRIDINE	ICSC: 0323 (November 2019)
Azine Azabenzene

CAS #: 110-86-1

UN #: 1282

EC Number: 203-809-9

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Vapour/air mixtures are explosive.	NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.	Use alcohol-resistant foam, water spray, powder, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

AVOID ALL CONTACT!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Dizziness. Headache. Nausea. Shortness of breath. Unconsciousness.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Artificial respiration may be needed. Refer for medical attention.
Skin	MAY BE ABSORBED! Redness. Burning sensation. Further see Inhalation.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention .
Eyes	Redness. Pain.	Wear safety goggles or face shield.	Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer for medical attention.
Ingestion	Cough. Sore throat. Further see Inhalation.	Do not eat, drink, or smoke during work.	Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention .

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Remove all ignition sources. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable air tight containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria DANGER Highly flammable liquid and vapour Harmful if swallowed, in contact with skin or if inhaled Causes skin and eye irritation Suspected of causing cancer Transportation UN Classification UN Hazard Class: 3; UN Pack Group: II
STORAGE
Store only in original container. Fireproof. Separated from strong oxidants and strong acids. Cool. Dry. Well closed. Store in an area without drain or sewer access.
PACKAGING

PYRIDINE

ICSC: 0323

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. Physical dangers The vapour is heavier than air and may travel along the ground; distant ignition possible. Chemical dangers Decomposes on burning. This produces toxic fumes of nitrogen oxides and hydrogen cyanide. Reacts violently with strong oxidants and strong acids. This generates fire and explosion hazard. The substance is a weak base.	Formula: C₅H₅N Molecular mass: 79.1 Boiling point: 115°C Melting point: -42°C Relative density (water = 1): 0.98 Solubility in water: freely soluble Vapour pressure, kPa at 20°C: 2.0 Relative vapour density (air = 1): 2.73 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.03 Flash point: 20°C c.c. Auto-ignition temperature: 482°C Explosive limits, vol% in air: 1.8-12.4 Octanol/water partition coefficient as log Pow: 0.65

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible.

Chemical dangers
Decomposes on burning. This produces toxic fumes of nitrogen oxides and hydrogen cyanide. Reacts violently with strong oxidants and strong acids. This generates fire and explosion hazard. The substance is a weak base.

Formula: C₅H₅N
Molecular mass: 79.1
Boiling point: 115°C
Melting point: -42°C
Relative density (water = 1): 0.98
Solubility in water: freely soluble
Vapour pressure, kPa at 20°C: 2.0
Relative vapour density (air = 1): 2.73
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.03
Flash point: 20°C c.c.
Auto-ignition temperature: 482°C
Explosive limits, vol% in air: 1.8-12.4
Octanol/water partition coefficient as log Pow: 0.65

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation, through the skin and by ingestion. 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. Exposure far above the OEL could cause lowering of consciousness.	Inhalation risk A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure This substance is possibly carcinogenic to humans.

EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

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. Exposure far above the OEL could cause lowering of consciousness.

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

Effects of long-term or repeated exposure
This substance is possibly carcinogenic to humans.

OCCUPATIONAL EXPOSURE LIMITS
TLV: 1 ppm as TWA; A3 (confirmed animal carcinogen with unknown relevance to humans). MAK: skin absorption (H); carcinogen category: 3

ENVIRONMENT
The substance is harmful to aquatic organisms.

NOTES
Pyridine can normally be detected by odour at levels well below the TLV. However, perception of the odour may decline quickly.

ADDITIONAL INFORMATION

EC Classification

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