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Isobutane cas no 75-28-5

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$1/MT FOB

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CAS No.:

75-28-5

Grade:

Industrial Grade

Content:

99%

Port:

qingdao

Brand:

hly

Packaging:

25kg in 40L refillable steel cylinder

Price valid (until):

2027-02-28

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Suqian City Hengliyuan Import and Export Trade Co., LTD

Company Type:

Trader

Location:

China

Qualification:

Main Products:

Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

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Product Description
Seller Information
Inquiry History

Description

Company Profile ----------
Suqian City Hengliyuan Import and Export Trade Co., LTD is a trading company. The company has introduced advanced scientific and technological achievements from home and abroad, and has superior products from well-known manufacturers at home and abroad. The basic functions are:
1. Domestic trade of various chemical raw materials;
2. Providing price information services and chemical raw material procurement for industrial enterprises;
3. Cooperating with Chinese state-owned enterprise factories, the price and quality are very advantageous.
At present, the company is relying on the combination of industry and trade and global procurement to steadily improve the company's value-added ability and compound competitiveness. We have always been committed to producing high-quality and low-cost goods, so we have been sincerely recognized by many customers. Our goal is to produce the best products and satisfy every customer with professional services and attitudes. We look forward to cooperating with you and establishing a win-win relationship with you. Please rest assured that we will definitely satisfy you.

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----------packaging and delivery ----------

----------Our Advantages---------
High quality with competitive price
1) Standard:BP/USP/EP/Enterprise standard
2) All Purity≥99%
3) We can provide high quality products with factory price
2. Fast delivery
1) Fast shipment.Various transportation methods for your choice.
2) We have our own agent/remailer/distributor who can help us ship our products very fast , and we have stock in the ir for transferring.
3. Good communication and credit
1) Fast response to customer within 5 hours
2) Good business credit in Europe, US, Japan, Korea, Af r ica and so on.

Complete Product Details – Isobutane CAS 75-28-5

1. Basic Identification Information

CAS No.: 75-28-5

Chemical Name: Isobutane

IUPAC Name: 2-Methylpropane

Synonyms: i-Butane, Isobutyl Hydride, Trimethylmethane

EINECS No.: 200-857-2

Molecular Formula: C₄H₁₀

Structural Formula: (CH₃)₃CH

Molecular Weight: 58.12

SMILES: CC(C)C

UN Number: UN 1969

HS Code: 27111990

Hazard Classification: Class 2.1 Extremely Flammable Liquefied Compressed Gas, Packing Group I

Chemical Category: Saturated aliphatic alkane, light petrochemical raw material & clean fuel

2. Physical & Chemical Properties

Appearance

Colorless, almost odorless gas under normal temperature and atmospheric pressure; forms transparent low-viscosity liquid under pressurization. Mercaptan odorant is added to commercial grade for leakage detection.

Core Physical Constants

Parameter	Standard Value
Melting Point	-159.4 ℃
Boiling Point	-11.7 ℃
Liquid Density (0 ℃)	0.603 g/cm³
Vapor Density (Air=1)	2.07, heavier than air, accumulates in low-lying areas
Closed Cup Flash Point	-82 ℃
Autoignition Temperature	460 ℃
Explosion Limit in Air (V/V)	1.8% ~ 8.4%
Vapor Pressure (20 ℃)	300 kPa
Solubility in Water	Slightly soluble, 48 mg/L at 25 ℃
Organic Solvent Solubility	Fully miscible with propane, butane, ether, benzene, gasoline and most hydrocarbon solvents

Key Chemical Characteristics

Stable saturated alkane structure under normal conditions; only undergoes substitution cracking reaction under high temperature and catalyst.
Highly flammable; complete combustion generates carbon dioxide and water vapor with low sulfur and clean exhaust; incomplete combustion produces toxic carbon monoxide.
Main raw material for dehydrogenation to produce isobutylene, core monomer for MTBE, butyl rubber and polyisobutene.
Weak asphyxiant: high concentration displaces oxygen in confined space and causes suffocation, no systemic toxicity to human body.
Incompatible with strong oxidants (chlorine, hydrogen peroxide, liquid oxygen); may trigger violent combustion or explosion under heating.
Low frostbite risk when liquid directly contacts skin due to rapid vaporization heat absorption.

3. Export Industrial Quality Specifications

Premium Refined Industrial Grade

Test Item	Standard Spec	Test Method
Isobutane Purity	≥99.5 vol%	Gas Chromatography GC
n-Butane Impurity	≤0.3 vol%	GC
Propane + Pentane Heavy Hydrocarbons	≤0.1 vol%	GC
Total Sulfur Content	≤10 ppm	Microcoulomb Sulfur Analysis
Water Content	≤30 ppm	Karl Fischer Titration / Dew Point Test
Free Water	No liquid water precipitation at -20 ℃	Low-Temperature Inspection
Appearance	Colorless transparent pressurized liquid without suspended impurities	Visual Inspection

Two Main Commercial Grades

Fuel Grade: Mixed with n-butane as LPG civil fuel, vehicle fuel, industrial heating gas
Chemical Raw Material Grade: High purity ≥99.5%, dedicated to dehydrogenation, alkylation and aerosol propellant production

4. Main Industrial Applications

4.1 Petrochemical Synthetic Raw Material (High-value Core Field)

Catalytic dehydrogenation to produce isobutylene, raw material for methyl tert-butyl ether (MTBE) high-octane gasoline additive.
Raw material for polyisobutylene, butyl rubber, polybutene and lubricant viscosity modifier.
Alkylation feedstock to synthesize high-octane alkylate oil for clean gasoline blending.
Oxidation to produce tert-butanol, methyl methacrylate (MMA) plastic monomer.

4.2 Aerosol Propellant Industry

Environment-friendly low-ozone-depletion propellant for hair spray, insecticide, air freshener, cosmetic aerosol instead of Freon.

4.3 Clean Fuel Field

Mixed with normal butane as LPG for residential cooking, catering heating and industrial boiler fuel.
Low-emission vehicle fuel for forklifts, small engineering machinery.

4.4 Refrigeration & Foaming Agent

Environmentally friendly hydrocarbon refrigerant for household refrigerators, freezers and small air conditioners, low GWP value.
Physical foaming agent for polyurethane rigid foam insulation boards, replacing fluorocarbons.

4.5 Other Scenarios

Cryogenic cooling medium for laboratory low-temperature equipment.
Extraction solvent for natural plant essential oil and fine chemical separation process.
Calibration standard gas for gas chromatograph instrument testing.

5. Safety, Packaging, Storage & Transportation Regulations

GHS Hazard Classification

Extremely Flammable Gas Category 1
Gas Under Pressure; May explode if heated
Simple Asphyxiant Hazard

Signal Word: Danger

Main Hazard Statements:

H220 Extremely flammable gas

H280 Contains gas under pressure; may explode if heated

H336 May cause drowsiness or dizziness via oxygen displacement

Export Standard Packaging

Small batch trial: Seamless high-pressure steel cylinders (50kg, 118kg per cylinder) equipped with safety relief valve and flame arrester.
Large bulk FCL shipment: Insulated pressure stainless steel tank container for sea and land transportation.

Storage Requirements

Store in independent Class A flammable gas tank yard, full explosion-proof electrical equipment, all tanks grounded for static elimination, ambient temperature ≤30 ℃, well open ventilation.
Strictly isolated from liquid oxygen, chlorine, oxidants, open flame and heat sources; underground confined storage is prohibited.
Equipped with hydrocarbon gas leakage detector, CO₂ and dry powder fire extinguishers; water mist can only cool tank surface, cannot extinguish gas flame.
Cylinders are stored upright and fixed with brackets; regular pressure and valve inspection every six months.

Sea & Land Transportation Rules

UN 1969, Class 2.1 extremely flammable liquefied compressed gas, Packing Group I

All tank containers and steel cylinders must keep anti-static grounding during transit; avoid collision, direct sunlight and high-temperature stacking.
Absolutely forbidden mixed loading with oxidants, toxic chemicals and food raw materials in one container.
Complete export clearance documents available: COA, MSDS, TDS, IMDG marine dangerous goods declaration, pressure vessel inspection certificate.

6. E-commerce Listing Copy (Direct Copy for Echemi / Alibaba)

Product Title

Isobutane 2-Methylpropane CAS 75-28-5 99.5% High Purity Liquefied Gas Raw Material for Isobutylene MTBE Aerosol Propellant Refrigerant PU Foam Blowing Agent

Short Description

Isobutane (i-Butane, CAS 75-28-5) high purity ≥99.5% colorless pressurized liquefied alkane gas. Widely used as dehydrogenation feedstock for isobutylene & MTBE gasoline additive, eco-friendly aerosol propellant, hydrocarbon refrigerant and PU foam physical blowing agent. Full set of dangerous goods export documents including COA, MSDS and TDS available for global bulk shipment.

Full Listing Description

Isobutane (2-Methylpropane, i-Butane) with CAS registry number 75-28-5 is a premium light saturated alkane extracted and refined from petroleum cracking and natural gas, supplied as transparent volatile liquid under sealed pressure complying with export industrial high-purity standard ≥99.5%. It features low impurity, clean combustion and excellent chemical reactivity for petrochemical conversion.

Core downstream application sectors include petrochemical dehydrogenation to produce isobutylene for MTBE and butyl rubber; environmental protection aerosol propellant replacing Freon; low-GWP refrigerant for household cooling equipment; physical foaming agent for polyurethane thermal insulation foam; and mixed clean LPG fuel for industrial heating. We supply two grades: chemical synthesis high-purity grade and fuel blending grade according to customer demand.

Flexible delivery options cover high-pressure steel cylinders and insulated stainless steel bulk tank containers for full container orders. Classified as UN1969 Class 2.1 extremely flammable dangerous goods, we provide complete official customs clearance and pressure vessel certification documents to support global sea and land transportation with stable long-term mass supply capacity.

7. Printable Export Certificate of Analysis Template

CERTIFICATE OF ANALYSIS

Product Name: High Purity Isobutane

CAS No.: 75-28-5

Grade: Export Premium Chemical Raw Material Grade

Net Weight: 118kg/cylinder

Manufacture Date:

Test Item	Standard Spec	Test Result	Test Method
Isobutane Volume Purity	≥99.5 vol%		GC Gas Chromatography
n-Butane Impurity	≤0.3 vol%		GC
C3 & C5 Heavy Hydrocarbons	≤0.1 vol%		GC
Total Sulfur Content	≤10 ppm		Microcoulomb Sulfur Test
Water Content	≤30 ppm		Dew Point Tester
Free Liquid Water	No precipitation at -20 ℃	Low-Temperature Visual Inspection
Appearance	Colorless transparent pressurized liquid without sediment	Visual Inspection

Conclusion: This batch meets premium export high-purity standard of Isobutane.

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ECHEMI Editorial Reference

colourless odourless gas (or colourless cryogenic liquid) 2-Methylpropane (isobutane), C4H10, a flammable gas, occurs in small quantities in natural gas and crude oil. It has been detected in urban atmospheres at concentrations of 44–74 ppb. It also evolves from natural sources and has been measured in diesel exhaust at 1.4–11 ppm and in cigarette smoke at 10 ppm. The partition coefficient of propane between olive oil and air at 37℃ is 12 using the method described by Sato and Nakajima and Perb

Certificates

Basic Info

Product Name:

Isobutane

Other Name:

Propane,2-methyl-;2-Methylpropane;Isobutane;iso-Butane;Trimethylmethane;1,1-Dimethylethane;A 31;A 31 (hydrocarbon);R 600a;Purifrigor Iso 2;Purifrigor Iso 2.5;Purifrigor Iso 3;Purifrigor Iso 3.5;70357-15-2;100494-20-0;1326305-81-0

CAS No.:

75-28-5

Molecular Formula:

C4H10

InChIKeys:

InChIKey=NNPPMTNAJDCUHE-UHFFFAOYSA-N

Molecular Weight:

58.12220

Exact Mass:

58.12

EC Number:

200-857-2

HScode:

2901100000

Categories:

Alcohols, Phenols, Phenol Alcohols

Characteristics

PSA:

XLogP3:

1.66230

Appearance:

Isobutane is a colorless gas with a faint petroleum-like odor. It is shipped as a liquefied gas under its vapor pressure. Contact with the liquid can cause frostbite. It is easily ignited. The vapors are heavier than air. Any leak can either be liquid or vapor. It can asphyxiate by the displacement of air. Under prolonged exposure to fire or intense heat the containers may rupture violently and rocket.

Density:

0.61415 g/cm³ @ Temp: -29.5 °C

Melting Point:

-138.3 °C

Boiling Point:

-11.7 °C

Flash Point:

-82ºC (closedºCup)

Refractive Index:

1.352

Water Solubility:

48.9 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1963, 1966)

Storage Conditions:

Where these substances are stored and used, precautions must be provided to prevent injury from fire and explosion and to prevent injury to health. /Aliphatic hydrocarbons/

Vapor Pressure:

72.2 psi ( 37.7 °C)

Vapor Density:

2.01 (21 °C, vs air)

Flammability characteristics:

Flammable Gas

Explosive limit:

vol% in air: 1.8.4

Odor:

Gasoline-like or natural gas odor.

See More Isobutane Properties 

Hazard Identification

Classification of the substance or mixture

Gases under pressure: Compressed gas

Flammable gases, Category 1A, Flammable gas

Germ cell mutagenicity, Category 1B

Carcinogenicity, Category 1A

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)
Signal word	Danger
Hazard statement(s)	H220 Extremely flammable gas H340 May cause genetic defects H350 May cause cancer
Prevention	P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P203 Obtain, read and follow all safety instructions before use. P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
Response	P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely. P381 In case of leakage, eliminate all ignition sources. P318 IF exposed or concerned, get medical advice.
Storage	P410+P403 Protect from sunlight. Store in a well-ventilated place. P403 Store in a well-ventilated place. 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. 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.Store in tightly closed containers in a cool, well-ventilated area away from incompatible materials ... and heat. Butanes

See More Isobutane Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Acrylonitrile,Sodium biselenite methylamine solution,Methylamine [anhydrous],Zinc dust,Hydrogen peroxide solution [content >8%],Triisopropyl borate

Location:
Shop No.15, 1st Floor, Building 12, Hengda Huafu, Sucheng District, Suqian City

Payment Terms:
TT against B/L draft before shipment,100% TT in advance

Average lead Time:
30

Total Annual Revenue:
Less than $1 million

Total Employees:
5-10

Year of Establishment:
2022
Company Overview

Suqian Hengliyuan Import and Export Corporation, Ltd. is a leading enterprise specializing in the international trade of chemical products. Established in Suqian, Jiangsu Province, China, our company has built a strong reputation for excellence and reliability in the chemical industry.

Our Mission

Our mission is to facilitate global trade by providing high-quality chemical products and exceptional service to our clients. We aim to be a bridge between manufacturers and end-users, ensuring the safe and efficient transfer of chemicals across borders.

Products and Services

We offer a comprehensive range of chemical products, including but not limited to:

Industrial Chemicals: Raw materials for various industries such as pharmaceuticals, agriculture, and manufacturing.

Specialty Chemicals: High-performance chemicals used in specific applications, including water treatment, coatings, and adhesives.

Bulk Chemicals: Large-volume chemicals for industrial processes and manufacturing needs.

Quality Assurance

At Suqian Hengliyuan Import and Export Corporation, Ltd., quality is our top priority. We adhere to stringent quality control measures and international standards to ensure that our products meet the highest levels of purity and performance. Our dedicated quality assurance team conducts rigorous inspections and testing to guarantee the integrity and safety of all our chemical products.

Global Network

Leveraging our extensive network of suppliers and partners, we are able to source and deliver a wide array of chemical products to clients worldwide. Our strategic partnerships and logistical expertise enable us to offer competitive pricing, timely delivery, and customized solutions to meet the diverse needs of our clients.

Commitment to Sustainability

We are committed to sustainable business practices and environmental stewardship. Our operations are designed to minimize environmental impact, and we continuously seek ways to improve our processes and reduce our carbon footprint. We work closely with our suppliers and customers to promote the responsible use and disposal of chemicals.

Customer Focus

Our clients are at the heart of everything we do. We pride ourselves on providing personalized service and building long-term relationships based on trust and mutual benefit. Our experienced team of professionals is dedicated to understanding our clients' needs and delivering solutions that exceed their expectations.

Inquiry History

3 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	Isobutane	5 MT	Jun 25, 2026
Germany	R600A Gas	1 KG	Sep 17, 2025
Paraguay	R600A Refrigerant	1150	May 29, 2025

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