Substance profile
2,2-dimethylpropane
2,2-dimethylpropane is a colorless gas or very volatile liquid with a gasoline-like odor.
01 · Identification
What 2,2-dimethylpropane is
2,2-dimethylpropane is a colorless gas or very volatile liquid with a gasoline-like odor. Its molecular formula is C5H12 and its molecular weight is 72.15 g/mol. It boils at 9.5 °C, melts at -16.4 °C.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 4th degree.
02 · Identifiers
2,2-dimethylpropane identifiers and molecular data
2,2-dimethylpropane CAS number and EC number
2,2-dimethylpropane molecular formula and molecular weight
Other names for 2,2-dimethylpropane
- neopentane
03 · GHS classification
2,2-dimethylpropane hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
2,2-dimethylpropane pictograms and signal word
2,2-dimethylpropane hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable gases GHS chapter 2.2 | Category 1A | H220 | GHS02 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | GHS09 |
2,2-dimethylpropane hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H220 | Extremely flammable gas. |
| H411 | Toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to 2,2-dimethylpropane. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for 2,2-dimethylpropane
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of 2,2-dimethylpropane issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
2,2-dimethylpropane precautionary statements
CLP Annex VI assigns 6 precautionary statements to 2,2-dimethylpropane. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
2,2-dimethylpropane name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | 2,2-диметилпропан неопентан |
| Spanish español | 2,2-Dimetilpropano neopentano |
| Czech čeština | 2,2-dimethylpropan neopentan |
| Danish dansk | 2,2-dimethylpropan neopentan |
| German Deutsch | 2,2-Dimethylpropan Neopentan |
| Estonian eesti | 2,2-dimetüülpropaan neopentaan |
| Greek ελληνικά | 2,2-διμεθυλοπροπάνιο νεοπεντάνιο |
| English English | 2,2-dimethylpropane neopentane |
| French français | 2,2-diméthylpropane néopentane |
| Croatian hrvatski | 2,2-dimetilpropan neopentan |
| Italian italiano | 2,2- dimetilpropano neopentano |
| Latvian latviešu | 2,2-dimetilpropāns neopentāns |
| Lithuanian lietuvių | 2,2-dimetilpropanas neopentanas |
| Hungarian magyar | 2,2-dimetilpropán neopentán |
| Maltese Malti | 2,2-dimetilpropan neopentan |
| Dutch Nederlands | 2,2-dimethylpropaan neopentaan |
| Polish polski | 2,2-dimetylopropan neopentan |
| Portuguese português | 2,2-dimetilpropano neopentano |
| Romanian română | 2,2-dimetilpropan neopentan |
| Slovak slovenčina | 2,2-dimetylpropán neopentán |
| Slovenian slovenščina | 2,2-dimetilpropan neopentan |
| Finnish suomi | 2,2-dimetyylipropaani neopentaani |
| Swedish svenska | 2,2-dimetylpropan neopentan |
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
2,2-dimethylpropane GHS label elements
Everything CLP Annex VI fixes for 2,2-dimethylpropane, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
2,2-dimethylpropane
- Extremely flammable gas.
- Toxic to aquatic life with long lasting effects.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Avoid release to the environment.
- Collect spillage.
- Store in a well-ventilated place.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 2,2-dimethylpropane in the GHS label constructor →
07 · Health hazards
2,2-dimethylpropane health hazards and exposure limits
2,2-dimethylpropane hazard summary
Narcosis and irritation are Critical Effects. [ACGIH] See n-Pentane.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
2,2-dimethylpropane occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 1000.0 [ppm] | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
2,2-dimethylpropane properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
2,2-dimethylpropane boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 9.5 °C (49.1 °F) | HSDB | |
| 9.5 °C (49.1 °F) | at 760 mmHg | DOE PAC |
2,2-dimethylpropane melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -16.37 °C (2.5 °F) | HSDB | |
| -16.6 °C (2.1 °F) | ICSC |
2,2-dimethylpropane density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.2377 g/cm³ | HSDB | |
| 0.591 g/cm³ | at 20 °C | HSDB | |
| 0.5852 g/cm³ | at 25 °C, at 760 mmHg | HSDB |
2,2-dimethylpropane solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Soluble in ethyl alcohol, ethyl ether, carbon tetrachloride | HSDB | |
| Solubility in water: none | ICSC | ||
| In water, 33.2 mg/L at 25 °C | at 25 °C | HSDB |
2,2-dimethylpropane vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 1100 mmHg | at 21 °C | HSDB |
| 1095 mmHg | at 20 °C | ICSC | |
| 1290 mmHg | at 25 °C | HSDB |
2,2-dimethylpropane flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | -7 °C (19.4 °F) | below this value | HSDB |
2,2-dimethylpropane autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 450 °C (842 °F) | HSDB |
2,2-dimethylpropane lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.4 % by volume | HSDB | |
| 1.3 % by volume | ICSC |
2,2-dimethylpropane upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 7.5 % by volume | HSDB |
2,2-dimethylpropane vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 2.5 (air = 1) | HSDB |
2,2-dimethylpropane odor threshold
| Property | Value | Conditions | Source |
|---|---|---|---|
| Odor threshold | Odor Threshold Low: 400.0 [ppm] | Haz-Map | |
| Odor threshold from ACGIH | Haz-Map |
2,2-dimethylpropane critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 160.6 °C (321.1 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
2,2-dimethylpropane fire and explosion behaviour
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
2,2-dimethylpropane fire potential
Both the gas and the liquid are flammable when exposed to heat or flame; can react vigorously with oxidizing materials.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
2,2-dimethylpropane storage and handling
2,2-dimethylpropane safe storage
Fireproof. Cool.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
2,2-dimethylpropane storage conditions
Store and handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding required. Keep separated from incompatible substances.
Source: Hazardous Substances Data Bank (HSDB)
2,2-dimethylpropane incompatible materials
Reacts with strong oxidizers, causing fire and explosion hazard. Attaks some plastics, rubbers, and coatings.
Source: Hazardous Substances Data Bank (HSDB)
2,2-dimethylpropane reactivity
2,2-DIMETHYLPROPANE may be incompatible with strong oxidizing agents like nitric acid. Charring may occur followed by ignition of unreacted hydrocarbon and other nearby combustibles. In other settings, mostly unreactive. Not affected by aqueous solutions of acids, alkalis, most oxidizing agents, and most reducing agents. Burns exothermically if heated sufficiently or when ignited in the presence of air, oxygen or strong oxidizing agents to produce carbon dioxide and water.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 2,2-dimethylpropane in the storage compatibility matrix →
11 · Questions
2,2-dimethylpropane — frequently asked questions
What is the CAS number of 2,2-dimethylpropane?
The CAS number of 2,2-dimethylpropane is 463-82-1. Its EC number is 207-343-7.
What is the chemical formula of 2,2-dimethylpropane?
The molecular formula of 2,2-dimethylpropane is C5H12 and its molecular weight is 72.15 g/mol.
What does a 2,2-dimethylpropane label have to show?
Under CLP Annex VI the label for 2,2-dimethylpropane carries the pictograms Flame, Gas cylinder and Environment and the signal word is Danger.
Is 2,2-dimethylpropane flammable?
Yes. CLP Annex VI assigns 2,2-dimethylpropane H220 — extremely flammable gas. The flash point reported for it is -7 °C (19.4 °F), below this value (HSDB).
Is 2,2-dimethylpropane a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 2,2-dimethylpropane. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health.
What is the exposure limit for 2,2-dimethylpropane?
The US occupational exposure limit reported for 2,2-dimethylpropane is 1000.0 [ppm] (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of 2,2-dimethylpropane?
The boiling point reported for 2,2-dimethylpropane is 9.5 °C (49.1 °F) (HSDB).
What is the melting point of 2,2-dimethylpropane?
The melting point reported for 2,2-dimethylpropane is -16.37 °C (2.5 °F) (HSDB).
How should 2,2-dimethylpropane be stored?
CLP Annex VI assigns 2,2-dimethylpropane the storage statement P403. Store and handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101. Grounding and bonding required. Keep separated from incompatible substances. (Hazardous Substances Data Bank (HSDB))
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