3-ethyl-3-methylpentane

C8H18

CAS1067-08-9
GHS02 Gefahrensymbol: Entzündbar – Flamme
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
GHS07 Gefahrensymbol: Gesundheitsschädlich/Reizend – Ausrufezeichen
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
Danger

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Identification

CAS Number
1067-08-9
EC Number
213-923-0
UN Number
1262
Index Number
601-009-00-8
PubChem CID
14018

Physical-chemical properties

Molecular Formula
C8H18
Molar Mass
114.23 g/mol
IUPAC Name
3-ethyl-3-methylpentane

Chemical Identifiers

InChI
InChI=1S/C8H18/c1-5-8(4,6-2)7-3/h5-7H2,1-4H3
InChI Key
GIEZWIDCIFCQPS-UHFFFAOYSA-N

Overview

3-ethyl-3-methylpentane (CAS 1067-08-9) is a branched alkane hydrocarbon with highly flammable properties and significant environmental toxicity concerns. This saturated hydrocarbon belongs to the C8 alkane family and represents a specific structural isomer of octane with a molecular weight of 114.23 g/mol. The compound features a pentane backbone with both ethyl and methyl substituents attached to the third carbon atom, creating a highly branched molecular structure that influences its physical and chemical properties. As a member of the aliphatic hydrocarbon group, it shares similar characteristics with related compounds such as cyclohexane and 2,2,3-trimethylbutane, though its unique branching pattern provides distinct performance attributes. The substance presents significant safety considerations, classified as a Category 2 flammable liquid and Category 1 aspiration toxicant under the Globally Harmonized System. Its hazard profile includes skin irritation potential, specific target organ toxicity affecting the central nervous system, and notable aquatic toxicity requiring careful environmental management. The compound requires handling under ADR Class 3 transportation regulations and displays multiple GHS pictograms indicating fire, health, and environmental hazards. Industrial applications typically leverage its solvent properties and chemical stability in specialized formulations, hydrocarbon blending operations, and as an intermediate in organic synthesis processes. The branched structure provides favorable volatility characteristics for certain industrial processes while maintaining the chemical inertness typical of saturated hydrocarbons. OYSI maintains reliable supply chains for 3-ethyl-3-methylpentane to support diverse European industrial requirements, ensuring consistent quality and regulatory compliance for technical applications.

Safety & Classification

Danger
Classification:

Flam. Liq. 2; Asp. Tox. 1; STOT SE 3; Skin Irrit. 2; Aquatic Acute 1; Aquatic Chronic 1

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H225

Highly flammable liquid and vapour.

H304

May be fatal if swallowed and enters airways.

H336

May cause drowsiness or dizziness.

H315

Causes skin irritation.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Irritant

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

Skin Contact

Irritant

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Ingestion

Toxic

Measures if substance is accidentally swallowed

First Aid Actions

  • +P301IF SWALLOWED:
  • +P330Rinse mouth.
  • +P331Do NOT induce vomiting.
  • +P310Immediately call a POISON CENTER/doctor.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number1262
ADR Class3
Packing GroupII
Tunnel CodeD/E
Proper Shipping Name3-Methyl-3-ethylpentan
Marine PollutantNo

Frequently Asked Questions

What is 3-ethyl-3-methylpentane?

3-ethyl-3-methylpentane is a branched alkane hydrocarbon with the molecular formula C8H18 and CAS number 1067-08-9. This organic compound belongs to the family of saturated hydrocarbons and has a molecular weight of 114.23 g/mol. It is classified as a flammable liquid with significant health and environmental hazards, requiring careful handling due to its toxicity and potential for aspiration if ingested.

What are the physicochemical properties of 3-ethyl-3-methylpentane?

3-ethyl-3-methylpentane is a colorless liquid hydrocarbon at room temperature with characteristic petroleum-like odor. As a nonpolar organic solvent, it exhibits low water solubility but readily dissolves in other organic solvents and hydrocarbons. The compound has a relatively low boiling point typical of C8 alkanes and high volatility, contributing to its flammability classification as Flam. Liq. 2.

What is 3-ethyl-3-methylpentane used for?

3-ethyl-3-methylpentane is primarily used as a specialty solvent in chemical synthesis and analytical applications. It serves as an intermediate in organic chemistry research and may be utilized in the production of other chemical compounds. Due to its specific branched structure, it can be employed in studies involving hydrocarbon behavior, fuel research, or as a reference standard in analytical chemistry laboratories.

How to handle 3-ethyl-3-methylpentane safely?

3-ethyl-3-methylpentane requires strict safety precautions including use of chemical-resistant gloves, safety goggles, and protective clothing to prevent skin irritation. Work in well-ventilated areas or under fume hoods to avoid inhalation of vapors that can cause respiratory irritation. Eliminate all ignition sources as the compound is highly flammable, and use appropriate personal protective equipment due to its aspiration toxicity classification.

How to store 3-ethyl-3-methylpentane correctly?

3-ethyl-3-methylpentane must be stored in a cool, dry, well-ventilated area away from heat, sparks, and open flames due to its Flam. Liq. 2 classification. Use properly grounded containers and storage systems to prevent static electricity buildup. Keep away from oxidizing agents and ensure containers are tightly sealed to prevent vapor release and environmental contamination, given its acute aquatic toxicity classification.

What to do in case of contact with 3-ethyl-3-methylpentane?

In case of skin contact with 3-ethyl-3-methylpentane, immediately remove contaminated clothing and wash affected area thoroughly with soap and water due to its skin irritant properties. If inhaled, move to fresh air immediately and seek medical attention if respiratory irritation occurs. Never induce vomiting if ingested due to aspiration toxicity risk - rinse mouth and seek immediate medical attention.

How to dispose of 3-ethyl-3-methylpentane properly?

3-ethyl-3-methylpentane must be disposed of through licensed hazardous waste disposal facilities in accordance with local and European waste regulations. The compound cannot be discharged to sewers or environment due to its Aquatic Acute 1 and Aquatic Chronic 1 classifications. Contaminated materials should be collected in appropriate containers and handled as hazardous waste requiring professional disposal services.

How to transport 3-ethyl-3-methylpentane?

3-ethyl-3-methylpentane is classified under ADR Class 3 (flammable liquids), Packing Group II, requiring specialized transport procedures. Packages must bear appropriate dangerous goods labels including GHS02, GHS08, GHS07, and GHS09 pictograms with 'Danger' signal word. Transportation must comply with ADR regulations for medium-hazard flammable liquids, using approved packaging and vehicles equipped for hazardous materials transport.

Is 3-ethyl-3-methylpentane subject to specific regulations?

3-ethyl-3-methylpentane is subject to European REACH and CLP regulations requiring proper classification and labeling with multiple hazard classes including Flam. Liq. 2, Asp. Tox. 1, and environmental hazards. While not currently listed as SVHC, it requires safety data sheets and appropriate risk management measures. Users must comply with occupational exposure limits and environmental protection requirements under various EU chemical safety directives.

Where to buy 3-ethyl-3-methylpentane in Europe?

3-ethyl-3-methylpentane is available through OYSI, a specialized European distributor of technical chemicals. OYSI provides this specialty hydrocarbon to laboratories, research institutions, and industrial customers across Europe with proper documentation and safety data sheets. As a professional chemical distributor, OYSI ensures compliance with European regulations and provides technical support for safe handling and application guidance.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.