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Sulfur and phosphorus compounds

Methanedisulfonic acid

Also known as Methionic acid, methylenedisulfonic acid, Methane disulfonic acid

CAS 503-40-2Formula CH4O6S2Molar mass 176.17 g/molEC 207-966-4
GHS signal word: Danger. Pictograms: Corrosive, Harmful or irritant 6 suppliers listed
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Methanedisulfonic acid chemical structure, CH4O6S2, CAS 503-40-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
503-40-2
Formula
CH4O6S2
Molar mass
176.17 g/mol
EC number
207-966-4
HS code
290410
Category
Sulfur and phosphorus compounds

What is Methanedisulfonic acid?

Plain description, key identifiers and synonyms

Methanedisulfonic acid is a chemical substance with the molecular formula CH4O6S2 and a molar mass of 176.17 g/mol. Its CAS registry number is 503-40-2.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methanedisulfonic acid
CAS number
503-40-2 CAS number cross-checkedOther or deprecated CAS: 6291-65-2
EC number
207-966-4
Molecular formula
CH4O6S2
UNII
55N1VUX48W
MDL number
MFCD00041888
InChIKey
OPUAWDUYWRUIIL-UHFFFAOYSA-N
InChI
InChI=1S/CH4O6S2/c2-8(3,4)1-9(5,6)7/h1H2,(H,2,3,4)(H,5,6,7)
SMILES (canonical and isomeric)
C(S(=O)(=O)O)S(=O)(=O)O

Synonyms

  • Methionic acid
  • methylenedisulfonic acid
  • Methane disulfonic acid
  • Methanedisulphonic acid
  • Methanedisulfonicacid
  • Methionsaure
  • 98% (contains <10%H2O)
  • Methionic Acid, Methylenedisulfonic Acid,

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
176.17 g/molcalc.
Exact mass
175.9449 Dacalc.
LogP (octanol/water)
-1.28calc.
Topological polar surface area
108.7 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
9calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
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
Danger
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H314Causes severe skin burns and eye damage.
  • H315Causes skin irritation.
  • H318Causes serious eye damage.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
  • H413May cause long lasting harmful effects to aquatic life.
Precautionary statements (24)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • 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.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P363Wash contaminated clothing before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Methanedisulfonic acid suppliers

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

All 6 suppliers
6 of 6 offers

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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Methanedisulfonic acid price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Methanedisulfonic acid is traded under.

HS 2904.10Indicative HS code

Derivatives containing only sulpho groups, their salts and ethyl esters

World exports in 2024
$447M
−5.5% vs 2023, imports $498M
2019 to 2024
Top exporters
  1. Germany21.1%
  2. China15.2%
  3. United States11.5%
Top importers
  1. United States8.5%
  2. China8.4%
  3. Sweden6.8%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Methanedisulfonic acid, based on the data on this page

What is Methanedisulfonic acid?

Methanedisulfonic acid is a chemical substance with the molecular formula CH4O6S2 and a molar mass of 176.17 g/mol. Its CAS registry number is 503-40-2.

What is the CAS number of Methanedisulfonic acid?

The CAS registry number of Methanedisulfonic acid is 503-40-2. Other or deprecated CAS numbers: 6291-65-2.

What is the molecular formula and weight of Methanedisulfonic acid?

The molecular formula of Methanedisulfonic acid is CH4O6S2 and its molar mass is 176.17 g/mol.

What is Methanedisulfonic acid used for?

Known uses and roles of Methanedisulfonic acid include building blocks in research and laboratory.

Is Methanedisulfonic acid hazardous?

Methanedisulfonic acid carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage, causes skin irritation, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Methanedisulfonic acid?

Methanedisulfonic acid is usually classified under HS code 290410 (Derivatives containing only sulpho groups, their salts and ethyl esters). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Methanedisulfonic acid?

CompoundList lists 6 suppliers of Methanedisulfonic acid in China, India and Italy. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Methanedisulfonic acid in India?

2 suppliers in India list Methanedisulfonic acid on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Methanedisulfonic acid?

Suppliers quote Methanedisulfonic acid 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 Methanedisulfonic acid

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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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