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Alcohols and polyols

(+)-2-Butanol

Also known as (S)-(+)-2-butanol, (S)-Butan-2-ol, (S)-2-butanol

CAS 4221-99-2Formula C4H10OMolar mass 74.12 g/molEC 224-168-1
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant 6 suppliers listed
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(+)-2-Butanol chemical structure, C4H10O, CAS 4221-99-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
4221-99-2
Formula
C4H10O
Molar mass
74.12 g/mol
Physical form
Liquid
HS code
290514
Category
Alcohols and polyols
Illustrative photo, 25 litre white jerry cans of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is (+)-2-Butanol?

Plain description, key identifiers and synonyms

(2S)-butan-2-ol is a butan-2-ol. It is an enantiomer of a (2R)-butan-2-ol.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(2S)-butan-2-ol
CAS number
4221-99-2
EC number
224-168-1
Molecular formula
C4H10O
UNII
69KXU5NDTO
MDL number
MFCD00064281
InChIKey
BTANRVKWQNVYAZ-BYPYZUCNSA-N
InChI
InChI=1S/C4H10O/c1-3-4(2)5/h4-5H,3H2,1-2H3/t4-/m0/s1
Canonical SMILES
CCC(C)O
Isomeric SMILES
CC[C@H](C)O

Synonyms

  • (S)-(+)-2-butanol
  • (S)-Butan-2-ol
  • (S)-2-butanol
  • 2-Butanol, (+)-
  • (2S)-butan-2-ol
  • (2S)-2-butanol
  • (s)-(+)-sec-butanol
  • (S)-sec-butanol
  • (S)-(+)-sec-Butyl alcohol
  • (s)-sec-butyl alcohol
  • (5)-(+)-sec-butanol
  • Butyl alcohol D-form
  • 2-Butanol, (2S)-
  • (2S)-(+)-Butan-2-ol
  • D-Butanol
  • s-(+)-2-butanol
  • (1S)-1-methylpropanol
  • Docosapentaenoic acid [w
  • (S)-(+)-2-Butanol, 98%
  • (S)-(+)-2-Butanol, 99%
  • Z-VAD(OH)-FMK (Caspase Inhibitor VI).cd
  • (S)-(+)-2-Butanol, ChiPros(R), produced by BASF, 99%

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
74.12 g/molcalc.
Exact mass
74.0732 Dacalc.
LogP (octanol/water)
0.78calc.
Topological polar surface area
20.23 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
1calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
1calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H226Flammable liquid and vapour.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
  • H336May cause drowsiness or dizziness.
Precautionary statements (20)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P337 + P317If eye irritation persists: Get medical help.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

(+)-2-Butanol suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 6 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

6 suppliers in 3 countries

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(+)-2-Butanol price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 603-127-00-5[2]

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code (+)-2-Butanol is traded under.

HS 2905.14Indicative HS code

Saturated monohydric alcohols, other butanols

World exports in 2024
$580M
+32.4% vs 2023, imports $486M
2019 to 2024
Top exporters
  1. Saudi Arabia27.8%
  2. Netherlands20.1%
  3. Malaysia12.5%
Top importers
  1. United States20.9%
  2. South Korea13.2%
  3. China10.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for (+)-2-Butanol is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about (+)-2-Butanol, based on the data on this page

What is (+)-2-Butanol?

(2S)-butan-2-ol is a butan-2-ol. It is an enantiomer of a (2R)-butan-2-ol.

What is the CAS number of (+)-2-Butanol?

The CAS registry number of (+)-2-Butanol is 4221-99-2.

What is the molecular formula and weight of (+)-2-Butanol?

The molecular formula of (+)-2-Butanol is C4H10O and its molar mass is 74.12 g/mol.

Is (+)-2-Butanol hazardous?

(+)-2-Butanol carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of (+)-2-Butanol?

(+)-2-Butanol is usually classified under HS code 290514 (Saturated monohydric alcohols, other butanols). This is indicative, confirm it with your customs broker before shipping.

Where can I buy (+)-2-Butanol?

CompoundList lists 6 suppliers of (+)-2-Butanol in United States, China and Japan. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of (+)-2-Butanol?

Suppliers quote (+)-2-Butanol on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle (+)-2-Butanol

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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