Substance profile
2-Chloropropionic acid
2-Chloropropionic acid is CRYSTALS with a pungent odor.
01 · Identification
What 2-Chloropropionic acid is
2-Chloropropionic acid is CRYSTALS with a pungent odor. Its molecular formula is C3H5ClO2 and its molecular weight is 108.52 g/mol. It boils at 186 °C, melts at -12.1 °C.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
2-Chloropropionic acid identifiers and molecular data
2-Chloropropionic acid CAS number and EC number
2-Chloropropionic acid molecular formula and molecular weight
03 · GHS classification
2-Chloropropionic acid hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
2-Chloropropionic acid pictograms and signal word
2-Chloropropionic acid hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 1A or 1B or 1C | H314 | GHS05 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
2-Chloropropionic acid hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H302 | Harmful if swallowed. |
| H314 | Causes severe skin burns and eye damage. |
This page lists only the codes assigned to 2-Chloropropionic acid. 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-Chloropropionic acid
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-Chloropropionic acid 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-Chloropropionic acid precautionary statements
CLP Annex VI assigns 8 precautionary statements to 2-Chloropropionic acid. 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-Chloropropionic acid 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-хлоропропионова киселина |
| Spanish español | Ácido 2-cloropropiónico |
| Czech čeština | 2-chlorpropanová kyselina |
| Danish dansk | 2-chlorpropionsyre |
| German Deutsch | 2-Chlorpropionsäure |
| Estonian eesti | 2-kloropropioonhape |
| Greek ελληνικά | 2-χλωροπροπιονικό οξύ |
| English English | 2-chloropropionic acid |
| French français | acide 2-chloropropionique |
| Croatian hrvatski | 2-klorpropionska kiselina |
| Italian italiano | acido 2-cloropropionico |
| Latvian latviešu | 2-hlorpropionskābe |
| Lithuanian lietuvių | 2-chlorpropiono rūgštis |
| Hungarian magyar | 2-klórpropionsav |
| Maltese Malti | aċidu 2-kloropropjoniku |
| Dutch Nederlands | 2-chloorpropionzuur |
| Polish polski | kwas 2-chloropropionowy |
| Portuguese português | ácido 2-cloropropiónico |
| Romanian română | acid 2-cloropropionic |
| Slovak slovenčina | kyselina 2-chlórpropánová 2-metylpropanoylchlorid |
| Slovenian slovenščina | 2-kloropropionska kislina |
| Finnish suomi | 2-klooripropionihappo |
| Swedish svenska | 2-klorpropionsyra |
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-Chloropropionic acid GHS label elements
Everything CLP Annex VI fixes for 2-Chloropropionic acid, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
2-Chloropropionic acid
- Harmful if swallowed.
- Causes severe skin burns and eye damage.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Do NOT induce vomiting.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 2-Chloropropionic acid in the GHS label constructor →
07 · Health hazards
2-Chloropropionic acid health hazards and exposure limits
2-Chloropropionic acid hazard summary
Causes testicular atrophy in rats after high-dose feeding; Corrosive to the skin and eyes; [ACGIH]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
2-Chloropropionic acid 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-Chloropropionic acid boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 186 °C (366.8 °F) | HSDB | |
| 185.56 °C (366 °F) | at 760 mmHg | CAMEO |
2-Chloropropionic acid melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | -12.1 °C (10.2 °F) | HSDB | |
| -12 °C (10.4 °F) | ICSC |
2-Chloropropionic acid density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.3 g/cm³ | ICSC | |
| 1.2585 g/cm³ | at 20 °C | HSDB |
2-Chloropropionic acid solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | SOL IN ALL PROP IN WATER, ALC, ETHER; SOL IN ACETONE | HSDB | |
| Solubility in water: miscible | ICSC |
2-Chloropropionic acid vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.13 mmHg | at 20 °C | HSDB |
| 0.7501 mmHg | at 20 °C | ICSC | |
| 1.06 mmHg | Haz-Map |
2-Chloropropionic acid flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 107.22 °C (225 °F) | HSDB | |
| 106 °C (222.8 °F) | ICSC |
2-Chloropropionic acid autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 500 °C (932 °F) | HSDB |
2-Chloropropionic acid lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 3.6 % by volume | calculated | CAMEO |
| 3.7 % by volume | ICSC |
2-Chloropropionic acid upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 14.3 % by volume | ICSC | |
| 3.6 % by volume | OSHA |
2-Chloropropionic acid vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 3.75 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
2-Chloropropionic acid storage and handling
2-Chloropropionic acid safe storage
Separated from strong bases, strong oxidants and food and feedstuffs.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Planning storage for a mix of chemicals? Check 2-Chloropropionic acid in the storage compatibility matrix →
10 · Transport
2-Chloropropionic acid UN number and transport classification
Transport classification is a separate system from the GHS classification above. It decides how a package is marked and how a load may be carried; it does not follow from the workplace label, and the workplace label does not follow from it. The entries below are linked by CAS number, never by name.
2-Chloropropionic acid under UN 2511 — shipping name, class and packing group
Europe · ADR 2025, Table A
| Proper shipping name (3.1.2) | Class | Classification code | PG | Labels (column 5) |
|---|---|---|---|---|
| 2-CHLOROPROPIONIC ACID | 8 | C3 | III | |
Source: ADR 2025, Table A of Chapter 3.2 · ECE/TRANS/352 Vol. I (UNECE). Class 8 is “Corrosive substances” (ADR 2.1.1.1).
United States · 49 CFR 172.101 Hazardous Materials Table
| Proper shipping name (column 2) | Class or division | PG | Labels (column 6) |
|---|---|---|---|
| 2-Chloropropionic acid | 8 | III | |
Source: 49 CFR 172.101 Hazardous Materials Table · eCFR, revision 2026-08-03. Class 8 is “Corrosive material” (49 CFR 173.2).
11 · Questions
2-Chloropropionic acid — frequently asked questions
What is the CAS number of 2-Chloropropionic acid?
The CAS number of 2-Chloropropionic acid is 598-78-7. Its EC number is 209-952-3.
What is the chemical formula of 2-Chloropropionic acid?
The molecular formula of 2-Chloropropionic acid is C3H5ClO2 and its molecular weight is 108.52 g/mol.
What does a 2-Chloropropionic acid label have to show?
Under CLP Annex VI the label for 2-Chloropropionic acid carries the pictograms Corrosion and Exclamation mark and the signal word is Danger.
Is 2-Chloropropionic acid flammable?
CLP Annex VI assigns 2-Chloropropionic acid no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it. The flash point reported for it is 107.22 °C (225 °F) (HSDB).
Is 2-Chloropropionic acid a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 2-Chloropropionic acid. 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-Chloropropionic acid?
The boiling point reported for 2-Chloropropionic acid is 186 °C (366.8 °F) (HSDB).
What is the melting point of 2-Chloropropionic acid?
The melting point reported for 2-Chloropropionic acid is -12.1 °C (10.2 °F) (HSDB).
Nearby
Substances next to 2-Chloropropionic acid
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