International Chemical Safety Cards

2-METHYLBUT-3-YN-2-OL ICSC: 1746
World Health Organization (WHO) International Labour Organization (ILO) United Nations Environmental Programme (UNEP) European Commission National Institute for Occupational Safety and Health (NIOSH)
2-Methyl-3-butyn-2-ol
Ethynyldimethylcarbinol
C5H8O/(CH3)2C(OH)CCH
Molecular mass: 84.1
3 Flammable Liquid placard ICSC #    1746
CAS #     115-19-5
RTECS # ES0810000
UN #        1987
November 24, 2009 Validated
De, GHS rechecked
TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Highly flammable.
NO open flames, NO sparks, and NO smoking.
Carbon dioxide. Foam. Dry powder. NO water.
EXPLOSION Vapour/air mixtures are explosive. Risk of explosion on contact with copper
Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.
In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.
EXPOSURE


 •INHALATION Cough. 131000
Ventilation.
Fresh air, rest.
 •SKIN
Protective gloves.
Rinse skin with plenty of water or shower.
 •EYES Redness. Pain. ding
Safety goggles
Rinse with plenty of water (remove contact lenses if easily possible). Refer for medical attention.
 •INGESTION Dizziness. cal irritation effects of the GI-tract)
Do not eat, drink, or smoke during work.
Rinse mouth.
SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
Personal protection: filter respirator for organic gases and vapours adopted to the airborne concentration of the substance. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer.
Fireproof. Separated from strong oxidants, acids, copper. Cool. 81000: 11 t elev. temp.

UN Hazard Class: 3
UN Packing Group: II
Signal: Danger
Flame-Excl mark
Highly flammable liquid and vapour
Harmful if swallowed
Causes eye irritation
SEE IMPORTANT INFORMATION ON BACK
ICSC: 1746 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

2-METHYLBUT-3-YN-2-OL ICSC: 1746
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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID

PHYSICAL DANGERS:
The vapour mixes well with air, explosive mixtures are formed easily.

CHEMICAL DANGERS:
Reacts with oxidants. Reacts with Reacts violently with acids. Heating may cause violent combustion or explosion. On contact with hot surfaces or flames this substance decomposes forming irritating fumes.

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


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by ingestion.

INHALATION RISK:
No indication can be given about the rate in which a harmful concentration of this substance in the air is reached.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is irritating to the eyes. uding, staphyloma after 8 days (animal studies) 24, 33;

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
PHYSICAL
PROPERTIES
Boiling point: 104-105C
Melting point: 2.6C
Density: 0.9
kg/m
Solubility in water: miscible
Vapour pressure, kPa at 20C: 2
Relative vapour density (air = 1): 2.9
Relative density of the vapour/air-mixture at 20C (air = 1): 1.04
Flash point: 20C c.c.
Auto-ignition temperature: 350C
Explosive limits, vol% in air: 1.8-16
Octanol/water partition coefficient as log Pow: 0.318
ENVIRONMENTAL
DATA

N O T E S
NFPA Code: H1; F3; R1;
ADDITIONAL INFORMATION


ICSC: 1746 2-METHYLBUT-3-YN-2-OL
(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.