1. PRODUCT AND COMPANY IDENTIFICATION
Product name : Acetylene
Chemical formula : C2H2
Synonyms : Acetylene (dissolved), Ethyne, welding gas
Product Use Description : General Industrial
Company Cryotech-Vietnam
Lu Xa, Thanh tri, Hoang mai, Ha Noi
Tel: +84-4-6434788, 6434789
Fax: +84-4-6434752

2. COMPOSITION/INFORMATION ON INGREDIENTS

Components CAS Number Concentration

(Volume)

Acetylene 74-86-2 100 %

Concentration is nominal. For the exact product composition, please refer to Air Products technical

specifications.

3. HAZARDS IDENTIFICATION

Emergency Overview

High pressure gas.

Can cause rapid suffocation.

Extremely flammable.

May form explosive mixtures in air.

Immediate fire and explosion hazard exists when mixed with air at concentrations exceeding the lower flammability

limit (LFL).

High concentrations that can cause rapid suffocation are within the flammable range and should not be entered.

Avoid breathing gas.

Self contained breathing apparatus (SCBA) may be required.

Potential Health Effects

Inhalation : May cause anesthetic effects. In high concentrations may cause asphyxiation.

Symptoms may include loss of mobility/consciousness.Victim may not be aware

of asphyxiation. Asphyxiation may bring about unconsciousness without

warning and so rapidly that victim may be unable to protect themselves.

Skin contact : No adverse effect.

Ingestion : Ingestion is not considered a potential route of exposure.

Chronic Health Hazard : Not applicable.

Exposure Guidelines

Primary Routes of Entry : Inhalation

Target Organs : None known.

Symptoms : Exposure to oxygen deficient atmosphere may cause the following symptoms:

Dizziness. Salivation. Nausea. Vomiting. Loss of mobility/consciousness.

Aggravated Medical Condition

None known.

Environmental Effects

Not harmful.

4. FIRST AID MEASURES

General advice : Remove victim to uncontaminated area wearing self contained breathing

apparatus. Keep victim warm and rested. Call a doctor. Apply artificial

respiration if breathing stopped.

Eye contact Rinse immediately with plenty of water for at least 15 minutes.

Skin contact : Wash with water and soap as a precaution.

Ingestion : Ingestion is not considered a potential route of exposure.

Inhalation : In case of shortness of breath, give oxygen. Move to fresh air. If breathing has

stopped or is labored, give assisted respirations. Supplemental oxygen may be

indicated. If the heart has stopped, trained personnel should begin

cardiopulmonary resuscitation immediately. Seek medical advice.

5. FIRE- FIGHTING MEASURES

Suitable extinguishing media : All known extinguishing media can be used.

Specific hazards : Upon exposure to intense heat or flame, cylinder will vent rapidly and or rupture

violently. Keep containers and surroundings cool with water spray. Extinguish

fire only if gas flow can be stopped. If possible, shut off the source of gas and

allow the fire to burn itself out. Do not extinguish a leaking gas flame unless

absolutely necessary. Spontaneous/explosive re-ignition may occur. Extinguish

any other fire. Move away from container and cool with water from a protected

position. Keep adjacent cylinders cool by spraying with large amounts of water

until fire burns itself out. If flames are accidentally extinguished, explosive reignition

may occur; therefore, appropriate measures should be taken (e.g. total

evacuation to protect persons from cylinder fragments and toxic fumes should a

rupture occur). Most cylinders are designed to vent contents when exposed to

elevated temperatures.

Special protective equipment

for fire-fighters

: Wear self contained breathing apparatus for fire fighting if necessary.

6. ACCIDENTAL RELEASE MEASURES

Personal precautions Evacuate personnel to safe areas. Remove all sources of ignition. Never enter

a confined space or other area where the flammable gas concentration is

greater the 10% of its lower flammable limit. Ventilate the area.

Environmental precautions Do not discharge into any place where its accumulation could be dangerous.

Should not be released into the environment. Prevent further leakage or

spillage if safe to do so.

Methods for cleaning up Ventilate the area. Approach suspected leak areas with caution.

Additional advice : Increase ventilation to the release area and monitor concentrations. If leak is

from cylinder or cylinder valve, call the Air Products emergency telephone

number. If the leak is in the user's system, close the cylinder valve, safely vent

the pressure, and purge with an inert gas before attempting repairs.

7. HANDLING AND STORAGE

Handling

Acetylene cylinders are heavier than other cylinders because they are packed with a porous filler material and

acetone. Never use acetylene in excess of 15 psig pressure. Protect cylinders from physical damage; do not

drag, roll, slide or drop. Do not allow storage area temperature to exceed 50°C (122°F). Only experienced and

properly instructed persons should handle compressed gases. Before using the product, determine its identity

by reading the label. Know and understand the properties and hazards of the product before use. When doubt

exists as to the correct handling procedure for a particular gas, contact the supplier. Do not remove or deface

labels provided by the supplier for the identification of the cylinder contents. When moving cylinders, even for

short distances, use a cart (trolley, hand truck, etc.) designed to transport cylinders. Leave valve protection caps

in place until the container has been secured against either a wall or bench or placed in a container stand and is

ready for use. Use an adjustable strap wrench to remove over-tight or rusted caps. Before connecting the

container, check the complete gas system for suitability, particularly for pressure rating and materials. Before

connecting the container for use, ensure that back feed from the system into the container is prevented. Ensure

the complete gas system is compatible for pressure rating and materials of construction. Ensure the complete

gas system has been checked for leaks before use. Employ suitable pressure regulating devices on all

containers when the gas is being emitted to systems with lower pressure rating than that of the container. Never

insert an object (e.g. wrench, screwdriver, pry bar, etc.) into valve cap openings. Doing so may damage valve,

causing a leak to occur. Open valve slowly. If user experiences any difficulty operating cylinder valve

discontinue use and contact supplier. Close container valve after each use and when empty, even if still

connected to equipment. Never attempt to repair or modify container valves or safety relief devices. Damaged

valves should be reported immediately to the supplier. Close valve after each use and when empty. Replace

outlet caps or plugs and container caps as soon as container is disconnected from equipment. Do not subject

containers to abnormal mechanical shocks which may cause damage to their valve or safety devices. Never

attempt to lift a cylinder by its valve protection cap or guard. Do not use containers as rollers or supports or for

any other purpose than to contain the gas as supplied. Never strike an arc on a compressed gas cylinder or

make a cylinder a part of an electrical circuit. Do not smoke while handling product or cylinders. Never recompress

a gas or a gas mixture without first consulting the supplier. Never attempt to transfer gases from one

cylinder/container to another. Always use backflow protective device in piping. Purge air from system before

introducing gas. When returning cylinder install valve outlet cap or plug leak tight. Never use direct flame or

electrical heating devices to raise the pressure of a container. Containers should not be subjected to

temperatures above 50°C (122°F). Prolonged periods of cold temperature below -30°C (-20°F) should be

avoided. All piped systems and associated equipment must be grounded.

Storage

Containers should be stored in a purpose build compound which should be well ventilated, preferably in the

open air. Observe all regulations and local requirements regarding storage of containers. Stored containers

should be periodically checked for general condition and leakage. Protect containers stored in the open against

rusting and extremes of weather. Containers should not be stored in conditions likely to encourage corrosion.

Containers should be stored in the vertical position and properly secured to prevent toppling. The container

valves should be tightly closed and where appropriate valve outlets should be capped or plugged. Container

valve guards or caps should be in place. Keep containers tightly closed in a cool, well-ventilated place. Store

containers in location free from fire risk and away from sources of heat and ignition. Full and empty cylinders

should be segregated. Do not allow storage temperature to exceed 50°C (122°F). Smoking should be prohibited

within storage areas or while handling product or containers. Display "No Smoking or Open Flames" signs in

the storage areas. The amounts of flammable or toxic gases in storage should be kept to a minimum. Return

empty containers in a timely manner. Flammable storage areas should be separated from oxygen and other

oxidizers by a minimum distance of 20 ft. (6.1 m.) or by a barrier of non-combustible material at least 5 ft. (1.5

m.) high, having a fire resistance rating of at least 1/2 hour.

Technical measures/Precautions

Containers should be segregated in the storage area according to the various categories (e.g. flammable, toxic,

etc.) and in accordance with local regulations. Keep away from combustible material. All electrical equipment in

the storage areas should be compatible with flammable materials stored. Containers containing flammable

gases should be stored away from other combustible materials. Where necessary containers containing oxygen

and oxidants should be separated from flammable gases by a fire resistant partition.

8. EXPOSURE CONTROLS / PERSONAL PROTECTION

Engineering measures

Provide natural or explosion-proof ventilation that is adequate to ensure flammable gas does not reach its lower

explosive limit.

Personal protective equipment

Respiratory protection : High concentrations that can cause rapid suffocation are within the flammable

range and should not be entered.

Hand protection : Sturdy work gloves are recommended for handling cylinders.

The breakthrough time of the selected glove(s) must be greater than the

intended use period.

Eye protection : Safety glasses recommended when handling cylinders.

Skin and body protection : Safety shoes are recommended when handling cylinders.

Wear as appropriate:

Flame retardant protective clothing.

Special instructions for

protection and hygiene

: Ensure adequate ventilation, especially in confined areas.

9. PHYSICAL AND CHEMICAL PROPERTIES

Form Dissolved gas.

Color Colorless gas

Odor Poor warning properties at low concentrations. Garlic-like.

Molecular Weight : 26.04 g/mol

Relative vapor density : 0.899 (air = 1)

Vapor pressure 638.14 psia (44.00 bar) at 20 °C

Density : 0.069 lb/ft3 (0.0011 g/cm3) at 70 °F (21 °C)

Note: (as vapor)

Specific Volume : 14.77 ft3/lb (0.9221 m3/kg) at 70 °F (21 °C)

Boiling point/range -120 °F (-84.2 °C)

Critical temperature 96 °F (35.6 °C)

Melting point/range : -113 °F (-80.8 °C)

Flash point -18 °C

Autoignition temperature : 325 °C

Upper flammability limit 83 %(V)

Lower flammability limit 2.4 %(V)

Water solubility 1.185 g/l

10. STABILITY AND REACTIVITY

Stability : Stable under normal conditions.

Conditions to avoid : Cylinders should not be exposed to sudden shock or sources of heat. Heat,

flames and sparks. May form explosive mixtures with air and oxidizing agents.

Materials to avoid : Under certain conditions, acetylene can react with copper, silver, and mercury

to form acetylides, compounds which can act as ignition sources. Brasses

containing less than 65% copper in the alloy and certain nickel alloys are

suitable for acetylene service undernormal conditions. Acetylene can react

Air Products and Chemicals,Inc Acetylene

explosively when combined with oxygen and other oxidizers including all

halogens and halogencompounds. The presence of moisture, certain acids, or

alkaline materials tends to enhance the formation of copper acetylides.

Under certain conditions, acetylene can react with copper, silver, and mercury

to form acetylides, compounds which can act as ignition sources. Brasses

containing less than 65% copper in the alloy and certain nickel alloys are

suitable for acetylene service undernormal conditions. Acetylene can react

explosively when combined with oxygen and other oxidizers including all

halogens and halogencompounds. The presence of moisture, certain acids, or

alkaline materials tends to enhance the formation of copper acetylides.

Oxygen.

Oxidizing agents.

Hazardous reactions Unstable. Stable as shipped. Do not use at pressure above 15 psig.

11. TOXICOLOGICAL INFORMATION

Acute Health Hazard

Ingestion : No data is available on the product itself.

Inhalation : No data is available on the product itself.

Skin. : No data is available on the product itself.

12. ECOLOGICAL INFORMATION

Ecotoxicity effects

Aquatic toxicity : No data is available on the product itself.

Toxicity to other organisms : No data available.

Persistence and degradability

Mobility : No data available.

Bioaccumulation : No data is available on the product itself.

Further information

This product has no known eco-toxicological effects.

13. DISPOSAL CONSIDERATIONS

Waste from residues / unused

products

: Contact supplier if guidance is required. Return unused product in orginal

cylinder to supplier. Do not discharge into areas where there is a risk of forming

an explosive mixture with air. Waste gas should be flared through a suitable

burner with flash back arrestor.

Contaminated packaging : Return cylinder to supplier.

Air Products and Chemicals,Inc Acetylene

14. TRANSPORT INFORMATION

DOT

Proper shipping name : Acetylene, dissolved

Class : 2.1

UN/ID No. UN1001

IATA

Proper shipping name Acetylene, dissolved

Class : 2.1

UN/ID No. UN1001

IMDG

Proper shipping name : ACETYLENE, DISSOLVED

Class : 2.1

UN/ID No. : UN1001

TDG

Proper shipping name : ACETYLENE, DISSOLVED

Class : 2.1

UN/ID No. : UN1001

Further Information

Avoid transport on vehicles where the load space is not separated from the driver's compartment. Ensure vehicle

driver is aware of the potential hazards of the load and knows what to do in the event of an accident or an

emergency. Note: If regulated as a hazardous material (Dangerous Good) in transportation, please refer to

shipping papers or contact Air Products for complete shipping description information.

15. REGULATORY INFORMATION

OSHA Hazard Communication Standard (29 CFR 1910.1200) Hazard Class(es)

Flammable. Compressed Gas.

16. OTHER INFORMATION

NFPA Rating

Health Fire 4

Instability : 2

HMIS Rating

Health Flammability : 4

Physical hazard : 2