International Chemical Safety Cards

2-METHYLBUT-3-YN-2-OL

ICSC: 1746

2-Methyl-3-butyn-2-ol
Ethynyldimethylcarbinol
C₅H₈O/(CH₃)₂C(OH)CCH
Molecular mass: 84.1

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: 104-105°C
Melting point: 2.6°C
Density: 0.9
kg/mł
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 2

Relative vapour density (air = 1): 2.9
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.04
Flash point: 20°C c.c.
Auto-ignition temperature: 350°C
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.