Substance profile
2-Methyl-2-butanol
2-Methyl-2-butanol is a colorless liquid with a characteristic odor.
01 · Identification
What 2-Methyl-2-butanol is
2-Methyl-2-butanol is a colorless liquid with a characteristic odor. Its molecular formula is C5H12O and its molecular weight is 88.15 g/mol. It boils at 102 °C, melts at -9.1 °C.
Under the GHS it carries the signal word Danger. It is classed as flammable agents - 3rd degree.
02 · Identifiers
2-Methyl-2-butanol identifiers and molecular data
2-Methyl-2-butanol CAS number and EC number
2-Methyl-2-butanol molecular formula and molecular weight
Other names for 2-Methyl-2-butanol
- 2-methylbutan-2-ol
- tert-pentanol
03 · GHS classification
2-Methyl-2-butanol hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
2-Methyl-2-butanol pictograms and signal word
2-Methyl-2-butanol hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable liquids GHS chapter 2.6 | Category 2 | H225 | GHS02 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 4 | H332 | GHS07 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
2-Methyl-2-butanol hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H225 | Highly flammable liquid and vapour. |
| H332 | Harmful if inhaled. |
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
This page lists only the codes assigned to 2-Methyl-2-butanol. 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-Methyl-2-butanol
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-Methyl-2-butanol 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-Methyl-2-butanol precautionary statements
CLP Annex VI assigns 15 precautionary statements to 2-Methyl-2-butanol. 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.
Response
What to do once exposure, spillage or fire has already happened.
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-Methyl-2-butanol 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-метилбутан-2-ол трет -пентанол |
| Spanish español | 2-Metilbutan-2-ol terc -pentanol |
| Czech čeština | 2-methylbutan-2-ol terc -amylalkohol |
| Danish dansk | 2-methyl-2-butanol tert -pentanolalkohol |
| German Deutsch | 2-Methylbutan-2-ol tert -Pentanoltert-Pentylalkohol |
| Estonian eesti | 2-metüülbutaan-2-ool tert -pentanool |
| Greek ελληνικά | 2-μεθυλοβουταν-2-όλη tert -πεντανόλη |
| English English | 2-methylbutan-2-ol tert -pentanol |
| French français | 2-méthylbutan-2-ol tert -pentanol |
| Croatian hrvatski | 2-metilbutan-2-ol tert -pentanol |
| Italian italiano | 2-metilbutan-2-olo alcool amilico terziario |
| Latvian latviešu | 2-metilbutān-2-ols terc -pentanols |
| Lithuanian lietuvių | 2-metilbutan-2-olis tret -pentanolis |
| Hungarian magyar | 2-metilbután-2-ol terc -pentanol |
| Maltese Malti | 2-metilbutan-2-ol terz -pentanol |
| Dutch Nederlands | 2-methylbutaan-2-ol tert -pentanol |
| Polish polski | 2-metylobutan-2-ol tert -pentanol |
| Portuguese português | 2-metil-2-butanol terc -pentanol |
| Romanian română | 2-metilbutan-2-ol terț -pentanol |
| Slovak slovenčina | 2-metylbután-2-ol terc -pentylalkohol |
| Slovenian slovenščina | 2-metilbutan-2-ol terc -pentanol |
| Finnish suomi | 2-metyyli-2-butanoli tert -pentanoli |
| Swedish svenska | 2-metylbutan-2-ol tert -pentanol |
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-Methyl-2-butanol GHS label elements
Everything CLP Annex VI fixes for 2-Methyl-2-butanol, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
2-Methyl-2-butanol
- Highly flammable liquid and vapour.
- Harmful if inhaled.
- May cause respiratory irritation.
- Causes skin irritation.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Keep container tightly closed.
- Use explosion-proof [electrical/ventilating/lighting/…] equipment.
- Use only non-sparking tools.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Use only outdoors or in a well-ventilated area.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF ON SKIN:
- IF INHALED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- If skin irritation occurs:
- Wash with plenty of water/…
- Store in a well-ventilated place.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 2-Methyl-2-butanol in the GHS label constructor →
07 · Health hazards
2-Methyl-2-butanol health hazards and exposure limits
2-Methyl-2-butanol hazard summary
Dangerous fire risk; [Hawley] A skin, eye, and respiratory tract irritant; Inhalation of high concentrations may cause CNS effects; [HSDB] An irritant; Inhalation of high concentrations can cause CNS depression; [MSDSonline]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
2-Methyl-2-butanol 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-Methyl-2-butanol boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 102.4 °C (216.3 °F) | at 760 mmHg | HSDB |
| 87.35 °C (189.2 °F) | HSDB |
2-Methyl-2-butanol melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -9.1 °C (15.6 °F) | HSDB | |
| -8.4 °C (16.9 °F) | HMDB |
2-Methyl-2-butanol density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 0.8096 g/cm³ | at 20 °C | HSDB |
2-Methyl-2-butanol solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility parameter = 20.758 sqrt(MJ/cu m) | HSDB | |
| Sol in 8 part water; miscible with alc, ether, benzene, chloroform, glycerol, oils | HSDB | ||
| Solubility in water: 12.1%wt at 20 °C; 11.0%wt at 25 °C; 10.1%wt at 30 °C | at 20 °C | HSDB |
2-Methyl-2-butanol vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 9.1133 mmHg | at 20 °C | HSDB |
| 16.7 mmHg | at 25 °C | HSDB | |
| 16.8 mmHg | Haz-Map |
2-Methyl-2-butanol flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 67 °C (152.6 °F) | CLOSED CUP | HSDB |
| 19.44 °C (67 °F) | CAMEO | ||
| 19 °C (66.2 °F) | Haz-Map |
2-Methyl-2-butanol autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 819 °C (1506.2 °F) | HSDB |
2-Methyl-2-butanol lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 1.2 % by volume | HSDB |
2-Methyl-2-butanol upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 9 % by volume | HSDB |
2-Methyl-2-butanol critical temperature and pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Critical temperature and pressure | 272 °C (521.6 °F) | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
2-Methyl-2-butanol 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-Methyl-2-butanol fire potential
FLAMMABLE, DANGEROUS FIRE RISK.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
2-Methyl-2-butanol storage and handling
2-Methyl-2-butanol storage conditions
KEEP TIGHTLY CLOSED & PROTECTED FROM LIGHT.
Source: Hazardous Substances Data Bank (HSDB)
2-Methyl-2-butanol incompatible materials
Forms explosive mixture with air. Contact with strong oxidizers and hydrogen trisulfide may cause fire and explosions. Incompatible with strong acids. Violent reaction with alkaline earth metals forming hydrogen, a flammable gas. /Amyl alcohols/
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check 2-Methyl-2-butanol in the storage compatibility matrix →
11 · Questions
2-Methyl-2-butanol — frequently asked questions
What is the CAS number of 2-Methyl-2-butanol?
The CAS number of 2-Methyl-2-butanol is 75-85-4. Its EC number is 200-908-9.
What is the chemical formula of 2-Methyl-2-butanol?
The molecular formula of 2-Methyl-2-butanol is C5H12O and its molecular weight is 88.15 g/mol.
What does a 2-Methyl-2-butanol label have to show?
Under CLP Annex VI the label for 2-Methyl-2-butanol carries the pictograms Flame and Exclamation mark and the signal word is Danger.
Is 2-Methyl-2-butanol flammable?
Yes. CLP Annex VI assigns 2-Methyl-2-butanol H225 — highly flammable liquid and vapour. The flash point reported for it is 67 °C (152.6 °F), CLOSED CUP (HSDB).
Is 2-Methyl-2-butanol a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 2-Methyl-2-butanol. 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 boiling point of 2-Methyl-2-butanol?
The boiling point reported for 2-Methyl-2-butanol is 102.4 °C (216.3 °F), at 760 mmHg (HSDB).
What is the melting point of 2-Methyl-2-butanol?
The melting point reported for 2-Methyl-2-butanol is -9.1 °C (15.6 °F) (HSDB).
How should 2-Methyl-2-butanol be stored?
CLP Annex VI assigns 2-Methyl-2-butanol the storage statement P403. KEEP TIGHTLY CLOSED & PROTECTED FROM LIGHT. (Hazardous Substances Data Bank (HSDB))
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