PYRIDINE

International Chemical Safety Cards

PYRIDINE

ICSC: 0323

PYRIDINE
Azine
Azabenzene
C₅H₅N
Molecular mass: 79.1
CAS # 110-86-1
RTECS # UR8400000
ICSC # 0323
UN # 1282
EC # 613-002-00-7

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

EXPOSURE
INHALATION	Cough. Dizziness. Headache. Nausea. Shortness of breath. Unconsciousness.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Artificial respiration if indicated. Refer for medical attention.
SKIN	MAY BE ABSORBED! Redness (further see Inhalation).	Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
EYES	Redness. Pain.		First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
INGESTION	Abdominal pain. Diarrhoea. Vomiting. Weakness (further see Inhalation).		Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer (extra personal protection: self-contained breathing apparatus).

Fireproof. Separated from strong oxidants, strong acids, food and feedstuffs. Cool. Dry. Well closed.

Do not transport with food and feedstuffs.
F symbol
Xn symbol
R: 11-20/21/22
S: 26-28
UN Haz Class: 3
UN Subsidiary Risks: 6.1
UN Packing Group: II

SEE IMPORTANT INFORMATION ON BACK

ICSC: 0323

Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

International Chemical Safety Cards

PYRIDINE

ICSC: 0323

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PHYSICAL STATE; APPEARANCE:
COLOURLESS HYGROSCOPIC LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
On combustion, forms toxic fumes (amines). The substance decomposes on heating or on burning producing toxic fumes (nitrogen oxides and hydrogen cyanide, ICSC # 0492). Reacts violently with strong oxidants and strong acids.

OCCUPATIONAL EXPOSURE LIMITS (OELs):
TLV (as TWA): 5 ppm; 16 mg/m³ (ACGIH 199?-199?).
MAK: 5 ppm; 15 mg/m³; (1992).

ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. The substance may cause effects on the central nervous system.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the central nervous system, liver and kidneys.

PHYSICAL
PROPERTIES

Boiling point: 115°C
Melting point: -42°C
Relative density (water = 1): 0.98
Solubility in water: miscible
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: 17°C (c.c.)
Auto-ignition temperature: 480°C
Explosive limits, vol% in air: 1.7-10.6
Octanol/water partition coefficient as log Pow: 0.65