Substance profile
Methanesulfonic Acid
Methanesulfonic Acid is a solid.
01 · Identification
What Methanesulfonic Acid is
Methanesulfonic Acid is a solid. Its molecular formula is CH4O3S and its molecular weight is 96.11 g/mol. It melts at 20 °C, is soluble in water.
Under the GHS it carries the signal word Danger. It is classed as corrosives.
02 · Identifiers
Methanesulfonic Acid identifiers and molecular data
Methanesulfonic Acid CAS number and EC number
Methanesulfonic Acid molecular formula and molecular weight
Other names for Methanesulfonic Acid
- methanesulphonic acid
03 · GHS classification
Methanesulfonic Acid hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Methanesulfonic Acid pictograms and signal word
Methanesulfonic Acid hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| 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.
Methanesulfonic Acid hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H314 | Causes severe skin burns and eye damage. |
This page lists only the codes assigned to Methanesulfonic 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 Methanesulfonic 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 Methanesulfonic 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
Methanesulfonic Acid precautionary statements
CLP Annex VI assigns 5 precautionary statements to Methanesulfonic 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
Methanesulfonic 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 | метансулфонова киселина |
| Spanish español | Ácido metanosulfónico |
| Czech čeština | methansulfonová kyselina |
| Danish dansk | methansulfonsyre |
| German Deutsch | Methansulfonsäure |
| Estonian eesti | metaansulfoonhape |
| Greek ελληνικά | μεθανοσουλφονικό οξύ |
| English English | methanesulphonic acid |
| French français | acide méthanesulfonique |
| Croatian hrvatski | metansulfonska kiselina |
| Italian italiano | acido metansolfonico |
| Latvian latviešu | metānsulfonskābe |
| Lithuanian lietuvių | metansulfonrūgštis |
| Hungarian magyar | metánszulfonsav |
| Maltese Malti | aċidu metansulfoniku |
| Dutch Nederlands | methaansulfonzuur |
| Polish polski | kwas metanosulfonowy |
| Portuguese português | ácido metanossulfónico |
| Romanian română | acid metansulfonic |
| Slovak slovenčina | kyselina metánsulfónová |
| Slovenian slovenščina | metansulfonska kislina |
| Finnish suomi | metaanisulfonihappo |
| Swedish svenska | metansulfonsyra |
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
Methanesulfonic Acid GHS label elements
Everything CLP Annex VI fixes for Methanesulfonic Acid, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Methanesulfonic Acid
- Causes severe skin burns and eye damage.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- Immediately call a POISON CENTER/doctor/…
- Do NOT induce vomiting.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Methanesulfonic Acid in the GHS label constructor →
07 · Health hazards
Methanesulfonic Acid health hazards and exposure limits
Methanesulfonic Acid hazard summary
Corrosive to skin; [Quick CPC] CNS depression occurs in high-dose animal studies; [HSDB] Causes burns; Inhalation of high concentration can cause chemical pneumonitis; [Aldrich MSDS]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · Physical and chemical properties
Methanesulfonic 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.
Methanesulfonic Acid boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 167 °C (332.6 °F) | at 10 mmHg (reduced pressure) | HSDB |
Methanesulfonic Acid melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 20 °C (68 °F) | HSDB |
Methanesulfonic Acid density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.4812 g/cm³ | at 18 °C | HSDB |
Methanesulfonic Acid solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Solubility at 26-28 °C in wt %: hexane, 0; benzene, 1.5; methylcyclopentane, 0; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47 | HSDB | |
| Soluble in alcohol, ether | HSDB | ||
| Soluble in water | HSDB |
Methanesulfonic Acid vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.000428 mmHg | at 25 °C | HSDB |
| 0.000428 mmHg | Haz-Map |
Methanesulfonic Acid flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 189 °C (372.2 °F) | HSDB | |
| 110 °C (230 °F) | Haz-Map |
Methanesulfonic Acid autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 500 °C (932 °F) | above this value, at 1013 mmHg | HSDB |
Methanesulfonic Acid lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | 11.4 % by volume | by volume | HSDB |
| Electrolysis of a mixture produced oxygen difluoride which exploded. | of hydrogen fluoride and methanesulfonic acid | HSDB |
Methanesulfonic Acid upper explosive limit (UEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Upper explosive limit (UEL) | 24.3 % by volume | by volume | HSDB |
Methanesulfonic Acid corrosivity
| Property | Value | Conditions | Source |
|---|---|---|---|
| Corrosivity | Corrosive to iron, steel, brass, copper, lead | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Methanesulfonic Acid storage and handling
Methanesulfonic Acid storage conditions
Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature: 2 - 8 °C. Heat sensitive.
Source: Hazardous Substances Data Bank (HSDB)
Methanesulfonic Acid incompatible materials
Materials to avoid: Amines, strong reducing agents, strong oxidizing agents, bases
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Methanesulfonic Acid in the storage compatibility matrix →
10 · Questions
Methanesulfonic Acid — frequently asked questions
What is the CAS number of Methanesulfonic Acid?
The CAS number of Methanesulfonic Acid is 75-75-2. Its EC number is 200-898-6.
What is the chemical formula of Methanesulfonic Acid?
The molecular formula of Methanesulfonic Acid is CH4O3S and its molecular weight is 96.11 g/mol.
What does a Methanesulfonic Acid label have to show?
Under CLP Annex VI the label for Methanesulfonic Acid carries the pictogram Corrosion and the signal word is Danger.
Is Methanesulfonic Acid flammable?
CLP Annex VI assigns Methanesulfonic 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 189 °C (372.2 °F) (HSDB).
Is Methanesulfonic Acid a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Methanesulfonic 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 Methanesulfonic Acid?
The boiling point reported for Methanesulfonic Acid is 167 °C (332.6 °F), at 10 mmHg (reduced pressure) (HSDB).
What is the melting point of Methanesulfonic Acid?
The melting point reported for Methanesulfonic Acid is 20 °C (68 °F) (HSDB).
How should Methanesulfonic Acid be stored?
Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage. Recommended storage temperature: 2 - 8 °C. Heat sensitive. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Methanesulfonic Acid
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