Safety data sheet
According to EC Directive 91/155/EEC
1. Identification of the substance/preparation and of the company/undertaking
Identification of the product
Catalogue No.: 100005
Product name: Acetaldehyde for biochemistry

Manufacturer/supplier identification
Company: Merck Ltd.
9th Floor, Monterey Tower, 2170 New Petchburi Road, Bangkapi, Huaykwang, Bangkok 10320
Tel: (662) 308 - 0218

2. Composition/information on ingredients
CAS-No.: 75-07-0 EC-Index-No.: 605-003-00-6
Molar mass: 44.05 EINECS-No.: 200-836-8
Molecular formula: C2H4O

3. Hazards identification
Extremely flammable. Irritating to eyes and respiratory system. Possible risks of irreversible effects.

4. First aid measures
After inhalation: fresh air.
After skin contact: wash off with plenty of water. Remove contaminated clothing.
After eye contact: rinse out with plenty of water with the eyelid held wide open.
After swallowing: make victim drink plenty of water, induce vomiting. Immediately summon doctor.
If breathing stops: mouth-to-mouth respiration or mechanical ventilation.

5. Fire-fighting measures
Suitable extinguishing media:
Water, CO2, foam, powder.

Special risks:
Combustible. Vapours heavier than air. Formation of explosive mixtures possible with air. Keep away from sources of ignition. Take measures to prevent electrostatic charging.

6. Accidental release measures
Person-related precautionary measures:
Do not inhale vapours/aerosols. Ensure supply of fresh air in enclosed rooms.

Procedures for cleaning / absorption:
Take up with liquid-absorbent material (e.g. Chemizorb ). Forward for disposal. Clean up affected area.

7. Handling and storage
No further requirements.

Tightly closed. In a well-ventilated place. Keep away from sources of ignition and heat. Cool (+2C to +8C).

8. Exposure controls/personal protection
Specific control parameter
MAK Germany (max. workplace conc.)
Acetaldehyde 50 ml/m3 or 91 mg/m3

Personal protective equipment:
Respiratory protection: required when vapours/aerosols are generated.
Eye protection: required
Hand protection: required
Other protective equipment: Antistatic protective clothing.
Industrial hygiene: Change contaminated clothing. Application of skin-protective barrier cream recommended. Wash hands and face after working with substance.

9. Physical and chemical properties
Form: liquid
Colour: colourless
Odour: pungent
pH value
at 10 g/l water (20 C) ~ 5
Melting temperature -123 C
Boiling temperature 21 C
Ignition temperature 140 C
Flash point -27 C
Explosion limits lower 4 Vol%
upper 57 Vol%
Vapour pressure (20 C) 1007 mbar
Density (20 C) 0.78 g/cm3
Solubility in water (20 C) soluble
ethanol (20 C) soluble

10. Stability and reactivity
Conditions to be avoided

Substances to be avoided
alkali hydroxides , halogens , halogen oxides , alkalis , acids , air , oxidizing agent , oxygen , nitrogen oxides , hydrogen peroxide , iron

Hazardous decomposition products
no information available

Further information
highly reactive ; tends to polymerize ; Formation of peroxides possible.
incompatible with : various plastics , rubber
Explosible with air in a vaporous/gaseous state.

11. Toxicological information
Acute toxicity
LD50 (oral, rat): 661 mg/kg ;
LC50 (inhalation, rat): 24 g/m3 /4 h
Lowest concentration known to have caused toxic symptoms in man after inhalation: TCLo (inhalation, human): 134 ppm(V) /30 min
Eye irritation test (rabbit): strong irritant effect

Subacute to chronic toxicity
The carcinogenic potential requires further clarification.
The possibility of an embryotoxic effect has not yet been fully assessed.

Further toxicological information
After inhalation: mucosal irritations , coughing , dyspnoea
After skin contact: local irritation symptoms
After eye contact: Lacrimal irritation due to vapours.
Systemic effects: nausea , vomiting , spasms , narcosis , depressed respiration Other notes: Absorption may result in damage of the following: liver

12. Ecological information
Biologic degradation:
Easily eliminable.

Behavior in environmental compartments:
Low bioaccumulation potential.

Ecotoxic effects:
Biological effects: Toxic for aquatic organisms Hazard for drinking water supplies. Risk of formation of explosive vapours above water surface.
Fish toxicity: L.idus LC50: 124 mg/l ;
Protozoa : EC10: 57 mg/l

Further ecologic data:
Do not allow to enter waters, waste water, or soil!

13. Disposal considerations
There are no uniform EC Regulations for the disposal of chemicals or residues. Chemical residues generally count as special waste. The disposal of the latter is regulated in the EC member countries through corresponding laws and regulations. We recommend that you contact either the authorities in charge or approved waste disposal companies which will advise you on how to dispose of special waste.

Disposal in compliance with official regulations. Handle contaminated packaging in the same way as the substance itself. If not officially specified differently, non-contaminated packaging may be treated like household waste or recycled.

14. Transport information
Transport over land ADR/RID and GGVS/GGVE (Germany)
GGVS/GGVE class: 3 Number and letter: 1a
ADR/RID class: 3 Number and letter: 1a
Name of material: 1089 ACETALDEHYD

River transport ADN/ADNR
not examined

Sea transport IMDG
IMDG class: 3.1 UN-No.: 1089 Packaging group: I
Ems: 3-06 MFAG: 300

Air transport ICAO-TI and IATA-DGR
ICAO/IATA class: 3 UN/ID-No.: 1089 Packaging group: I
Correct technical name: ACETALDEHYDE

The transport regulations are cited according to international regulations and in the form applicable in Germany (GGVS/GGVE). Possible national deviations in other countries are not considered.

15. Regulatory information
Labelling according to EC Directives
Symbol: F+ Extremely flammable immediately and show this container or label.
Xn Harmful immediately and show this container or label.
R-phrases: R 12-36/37-40 Extremely flammable. Irritating to eyes and respiratory system. Possible risks of irreversible effects.
S-phrases: S 16-33-36/37 Keep away from sources of ignition - No smoking. Take precautionary measures against static discharges. Wear suitable protective clothing and gloves.
EC-No.: 200-836-8 EC label

German regulations
Water pollution class 1 (slightly polluting substance)

16. Other information
Reason for alteration
Change in transport classification.
Change in the chapter on toxicology.