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NIOSH

CROTONALDEHYDE

ICSC: 0241

Propylene aldehyde
2-Butenal
beta-Methylacrolein
Methyl propenal
C4H6O / CH3CH=CHCHO
Molecular mass: 70.1
ICSC # 0241 		CAS # 4170-30-3
RTECS # GP9499000
UN # 1143
EC # 605-009-00-9
June 05, 2003 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Highly flammable. Many reactions may cause fire or explosion.
NO open flames, NO sparks, and NO smoking. NO contact with oxidants and incompatible substances (see Chemical Dangers).
Powder, alcohol-resistant foam, water spray, 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. Combat fire from a sheltered position.
EXPOSURE
PREVENT GENERATION OF MISTS! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Refer for medical attention. Half-upright position. Artificial respiration may be needed.
•SKIN Redness. Burning sensation. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES Corrosive. Redness. Pain. Severe deep burns.
Face shield, or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Abdominal pain. Burning sensation. Diarrhoea. Nausea. Vomiting.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give one or two glasses of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. 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 absorb in saw-dust or other combustible absorbents. Do NOT let this chemical enter the environment. Chemical protection suit including self-contained breathing apparatus.
Fireproof. Separated from food and feedstuffs . See Chemical Dangers. Cool. Keep in the dark. Well closed. Store only if stabilized.
Airtight. Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Marine pollutant.
F symbol
T+ symbol
N symbol
R: 11-24/25-26-37/38-41-48/22-50-68
S: 1/2-26-28-36/37/39-45-61
UN Hazard Class: 6.1
UN Subsidiary Risks: 3
UN Packing Group: I
ICSC: 0241 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

CROTONALDEHYDE

ICSC: 0241

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID , WITH PUNGENT ODOUR. TURNS PALE YELLOW ON EXPOSURE TO LIGHT AND AIR.

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

CHEMICAL DANGERS:
The substance can presumably form explosive peroxides. The substance may polymerize with fire or explosion hazard. The substance is a strong reducing agent and reacts violently with oxidants and many other substances causing fire and explosion hazard. Attacks plastic and many other substances.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.3 ppm; (Ceiling value); (skin); A3; (ACGIH 2003).
MAK: skin absorption (H);
Carcinogen category: 3B; Germ cell mutagen group: 3B
(DFG 2006).
OSHA PEL: TWA 2 ppm (6 mg/m3)
NIOSH REL: TWA 2 ppm (6 mg/m3) See Appendix C (Aldehydes)
NIOSH IDLH: 50 ppm See: 123739


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

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

EFFECTS OF SHORT-TERM EXPOSURE:
Lachrymation. The vapour is severely irritating to the skin , the respiratory tract , and is corrosive to the eyes. Inhalation of high concentrations may cause lung oedema (see Notes). Inhalation of high concentrations may cause death. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:

PHYSICAL
PROPERTIES

Boiling point: 104°C
Melting point: (trans) -76.5; (cis) -69°C
Relative density (water = 1): 0.85
Solubility in water, g/100 ml: 15-18
Vapour pressure, kPa at 20°C: 4.0
Relative vapour density (air = 1): 2.41
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.06
Flash point: 13°C o.c.
Auto-ignition temperature: 232.2°C
Explosive limits, vol% in air: 2.1-15.5
Octanol/water partition coefficient as log Pow: 0.63

ENVIRONMENTAL
DATA

The substance is toxic to aquatic organisms.

N O T E S

The occupational exposure limit value should not be exceeded during any part of the working exposure. Rinse contaminated clothes (fire hazard) with plenty of water. Check for peroxides prior to distillation; eliminate if found. Crotonaldehyde is stabilized with water. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Card has been partly updated in October 2006: see sections Occupational Exposure Limits, Ingestion first aid.
Transport Emergency Card: TEC (R)-61GTF1-I

NFPA Code: H4; F3; R2;

ADDITIONAL INFORMATION



ICSC: 0241 CROTONALDEHYDE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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