International Chemical Safety Cards

1-UNDECANETHIOL ICSC: 1621
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
n-Undecyl mercaptan
Undecyl mercaptan
Undecanethiol
C11H24S / CH3(CH2)10SH
Molecular mass: 188.4
ICSC #    1621
CAS #     5332-52-5
April 05, 2006 Validated
TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION


EXPOSURE


 •INHALATION Cough. Sore throat. Headache. Nausea.
Ventilation.
Fresh air, rest.
 •SKIN Redness.
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
 •EYES Redness.
Safety spectacles,
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
 •INGESTION Headache. Nausea. Vomiting.
Do not eat, drink, or smoke during work.
Give one or two glasses of water to drink.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place.
Separated from strong oxidants, strong bases, strong acids and strong reducing agents

SEE IMPORTANT INFORMATION ON BACK
ICSC: 1621 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.

International Chemical Safety Cards

1-UNDECANETHIOL ICSC: 1621
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PHYSICAL STATE; APPEARANCE:
 LIQUID , WITH CHARACTERISTIC ODOUR.

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

CHEMICAL DANGERS:
 Reacts violently with oxidants, reducing agents, strong acids and strong bases. The substance decomposes on heating producing toxic and corrosive fumes, including hydrogen sulfide and sulfur oxides.

OCCUPATIONAL EXPOSURE LIMITS:
 TLV not established.
MAK not established.


 ROUTES OF EXPOSURE:

INHALATION RISK:
 No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
 The substance is irritating to the eyes, the skin and the respiratory tract.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Boiling point: 257-259°C
Melting point: -3°C
Relative density (water = 1): 0.84
 Solubility in water: none
Flash point: 109°C
Explosive limits, vol% in air: 0.6-?
ENVIRONMENTAL
DATA

N O T E S
Health effects of exposure to the substance have not been investigated adequately. Environmental effects from the substance have not been investigated adequately. See ICSC 0042.
ADDITIONAL INFORMATION


ICSC: 1621 1-UNDECANETHIOL
(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.