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Propyne Supplier C3H4 Gas

Name: Propyne Supplier C3H4 Gas
Brand: Chengdu xenon
SKU: pr2605251442
Price: 100 USD
Availability: InStock

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CAS No.:

74-99-7

Grade:

Industrial Grade

Content:

98%

Port:

ShangHai

Brand:

Chengdu xenon

Packaging:

40L/26kg

Price valid (until):

2026-05-25

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Chengdu Xenon Tritium Technology Co.,Ltd.

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Industrial Gases

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Product Description
Seller Information
Inquiry History

Description

Propyne, or methyl acetylene, is a alkyne that is one of the components of MAPP gas. When mixed with air, an explosive mixture can be formed. The gas is heavier than air and can spread to a considerable distance at the lowest point.

CAS NO	74-99-7
UN NO	1954
EINECS NO	200-828-4
Molecular weight	40.06
Appearance	Colorless, flammable gas with a sweet odor
Melting point	-102.7℃
Boiling point	-23.2℃
Density	0.6070
DOT Class	2.1
Label	flammable gas

Certificates

Basic Info

Product Name:

Propyne

Other Name:

1-Propyne;Propyne;Methylacetylene;Propine;Allylene;369597-38-6

CAS No.:

74-99-7

Molecular Formula:

C3H4

InChIKeys:

InChIKey=MWWATHDPGQKSAR-UHFFFAOYSA-N

Molecular Weight:

40.06390

Exact Mass:

40.06

EC Number:

200-828-4

UNII:

086L40ET1B

ICSC Number:

0560

UN Number:

3161|2850|1954

DSSTox ID:

DTXSID0026387

Color/Form:

Colorless gas [Note: Shipped as a liquefied compressed gas].

HScode:

2901299090

Categories:

Industrial Gases

Characteristics

PSA:

XLogP3:

0.63950

Appearance:

1-propyne appears as a colorless liquefied gas with a sweet odor. mp: -104°C, bp: -23.1°C. Insoluble in water, soluble in ethanol, chloroform and benzene. Moderately toxic by inhalation. Used as a specialty fuel. Denser than air. Vapors may ignite at distant sources of ignition and flash back.

Density:

0.7062 g/cm³ @ Temp: -50 °C

Melting Point:

-102.7 °C

Boiling Point:

-23.2 °C @ Press: 760 Torr

Flash Point:

-51 °C

Refractive Index:

1.363

Water Solubility:

3,640 mg/L at 20 °C (quoted, Verschueren, 1983)

Storage Conditions:

Fireproof. Cool.

Vapor Pressure:

204.6 mm Hg ( −49.5 °C)

Vapor Density:

1.41

Flammability characteristics:

Flammable Gas

Explosive limit:

Explosive limits , vol% in air: 2.4-11.7

Odor:

Sweet odor

OH:

5.90e-12 cm3/molecule*sec

Henrys Law Constant:

Henry's Law constant = 1.10X10-2 atm-cu m/mol at 25 °C (est)

Experimental Properties:

Specific vol = 9.7 cu ft/lb at 70 °F|Heat of formation = 185.6 kJ/mol|Heat capacity = 67.6 J/mol-deg K at 25 °C|Heat conductivity: Gas at 1 atm, 298 deg K = 0.018 W/m deg K; Liquid at 233 deg K = 0.16 W/m deg K|Hydroxyl radical reaction rate constant = 5.90X10-12 cu cm/molec-sec at 25 °C

Air and Water Reactions:

Highly flammable. PEROXIDE FORMING WHICH LEADS TO EXPLOSIONS

Reactive Group:

Hydrocarbons, Aliphatic Unsaturated

Reactivity Alerts:

Highly Flammable

Reactivity Profile:

1-PROPYNE is highly flammable. The liquid material in cylinders contains about 30% propadiene. Detonation may occur at 95° C [MCA Case History No. 632]. Reacts exothermically with many oxidizing agents and with some reducing agents as well. May react with silver, copper, and mercury salts in aqueous solution to give explosive acetylides. Incompatible with brass that contains more than 65% copper, with other copper-containing alloys, with Monel metal, with neoprene, polyethylene, and, to a lesser extent, with Teflon. May enflame in air in the presence of Co, Hg, Hg salts, K, Ag, Ag salts, RbH, CsH, halogens, HNO3, NaH. Can decompose explosively when compressed to 4.5 to 5.6 atmospheres. Moderate explosion hazard when exposed to heat or flame or by spontaneous chemical reaction. Has been known to decompose explosively at high pressures and moderate temperatures in the absence of air.

Peroxide Forming Chemical:

Methyl acetylene|B: Compounds that form peroxides on concentration (distillation/evaporation)|Kelly

Heat of Combustion:

-1.8496X10+9 J/kmol

Ionization Potential:

10.36 eV

Flammable Limits:

Lower flammable limit: 1.7% by volume|Flammable limits in air, % by volume: Lower: 1.7; Upper: 11.7.|Flammable Gas

Physical Dangers:

The gas is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated.

Critical Temperature & Pressure:

Critical temperature: 400.8 deg K; critical pressure: 5.35 MPa

See More Propyne Properties 

Hazard Identification

Classification of the substance or mixture

Flammable gases, Category 1A, Flammable gas

Gases under pressure: Liquefied gas

Specific target organ toxicity â single exposure, Category 3

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H220 Extremely flammable gas H280 Contains gas under pressure; may explode if heated H335 May cause respiratory irritation
Prevention	P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P271 Use only outdoors or in a well-ventilated area.
Response	P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely. P381 In case of leakage, eliminate all ignition sources. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P319 Get medical help if you feel unwell.
Storage	P403 Store in a well-ventilated place. P410+P403 Protect from sunlight. Store in a well-ventilated place. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P405 Store locked up.
Disposal	P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Use non-sparking handtools. Prevent build-up of electrostatic charges (e.g., by grounding). Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Fireproof. Cool.Fireproof. Cool.

See More Propyne Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Industrial Gases

Location:
No. 1015, Floor 10, Unit 1, Building 2, No. 1700, North Section of Tianfu Avenue, Chengdu High-tech Zone, China (Sichuan) Pilot Free Trade Zone

Payment Terms:
D/P,L/C,D/A

Total Annual Revenue:
$1 million-$2.5 million

Total Employees:
11-50

Year of Establishment:
2018

Certifications:
Occupational Health,Environmental management

Your Trusted Partner for High-Purity & Specialty Gases
Chengdu Xenon Tritium Technology Co., Ltd. is a professional supplier of specialty gases, high-purity gases, ultra-high purity gases, and rare gases. Founded in 2018 and headquartered in the Chengdu High-tech Zone, we have rapidly grown into a reliable partner for the semiconductor, power, medical, and research sectors.
Our Core Competencies:
Deep Industry Expertise: With over 15 years of collective experience in the gas industry and more than 5 years in international trade, our team possesses the technical knowledge to serve demanding applications.
Comprehensive Product Portfolio: We offer a wide spectrum of products, including electronic specialty gases (Silane, Tungsten Hexafluoride, Nitrogen Trifluoride), rare gases (Xenon, Krypton, Neon), isotope gases (Deuterium), and standard gas mixtures. We also provide gas handling equipment such as valves, hoses, and filling fittings.
Quality Assurance: We operate with a strict quality control system. Our high-purity gases (up to 6N grade) meet rigorous international standards, and every shipment is accompanied by a Certificate of Analysis (COA) and Material Safety Data Sheet (MSDS).
Safety & Logistics: Safety is our priority. We employ a specialized logistics team for dangerous goods, utilize professional vehicles, and provide 24/7 monitoring to ensure safe and timely delivery. We offer a variety of packaging options from high-pressure steel cylinders to ISO tanks.
Our Service Philosophy: We are not just a gas supplier; we are a one-stop solution provider. From custom gas mixture formulation (ppm to % levels) to the design of gas delivery systems (like BSGS for electronics), we support our clients with responsive service and technical guidance.
Partner with Us: Whether you need a reliable source for critical semiconductor materials, standard gases for laboratory calibration, or rare gases for cutting-edge research, Chengdu Xenon Tritium Technology is your partner of choice. Contact us to discuss how we can support your success.

Inquiry History

3 Inquiries

Country	Product	Purchase Quantity	Date Posted
United States	Propyne	40 MT	Jun 5, 2024
India	Propyne	100 KG	May 12, 2025
India	5-Bromothiophene-2-carbaldehyde	1.00 KG	May 6, 2026

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