Methanesulfonic acid
Synonym(s):Methanesulfonic acid;Methanesulfonic acid solution;MSA
- CAS NO.:75-75-2
- Empirical Formula: CH4O3S
- Molecular Weight: 96.11
- MDL number: MFCD00007518
- EINECS: 200-898-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-11-24 18:23:39
What is Methanesulfonic acid?
Description
Methanesulfonic acid (MSA), the simplest alkanesulfonic acid, is a hygroscopic colorless liquid or white solid, depending on whether the ambient temperature is greater or less than 20 oC. It is very soluble in water and oxygenated solvents, but sparingly soluble in most hydrocarbons. In aqueous solution, it is a strong acid (completely ionized).
MSA’s acidity and solubility properties make it industrially valuable as a catalyst in organic reactions, particularly polymerization. In many applications, its advantage over concentrated sulfuric acid is that it has similar acid strength but is not an oxidant.
The first report of MSA synthesis was in a 1950 patent awarded to John C. Snyder and Aristid V. Grosse of Houdry Process Corp. (subsequently acquired by Air Products). They heated methane and sulfur trioxide to 200–325 oC under pressure in the presence of a mercury catalyst. BASF currently produces the acid via a two-step process in which methanol and elemental sulfur react to give dimethyl disulfide, which is then oxidized to the final product.
For decades, chemists tried to find a way to prepare methanesulfonic acid from methane and sulfur trioxide under much milder conditions than were used in the original method. In 2015, Grillo-Werke (Duisburg, Germany), in a world patent application, described the preparation of alkanesulfonic acids from alkanes and SO3?in the presence of an organic peroxide at temperatures up to 65 oC and pressures up to 11 MPa. In June of this year, Grillo announced plans to compete with BASF by?building a plant to produce MSA?with a process that is likely based on that patent.
Grillo believes that its process will increase the supply of MSA so that it can be used for more applications. The company says that the plant should be operating by 2019
The Uses of Methanesulfonic acid
Polymerization catalyst.
Methanesulfonic acid has been developed as an esterification catalyst in place of sulfuric acid for the synthesis of resins in paints and coatings. One of the major advantages of methanesulfonic acid over sulfuric acid is that it is not an oxidizing species.
What are the applications of Application
Methanesulfonic acid solution is useful for ion chromatography
Properties of Methanesulfonic acid
Melting point: | 17-19 °C (lit.) |
Boiling point: | 167 °C/10 mmHg (lit.) |
Density | 1.475-1.485 g/mL at 20 °C
1.481 g/mL at 25 °C (lit.) |
Flash point: | >230 °F |
storage temp. | 2-8°C |
solubility | water: soluble1,000 g/L at 20°C |
form | Solution |
color | brown |
Water Solubility | Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins. |
Sensitive | Light Sensitive & Hygroscopic |
Safety information for Methanesulfonic acid
Signal word | Danger |
Pictogram(s) |
Corrosion Corrosives GHS05 Exclamation Mark Irritant GHS07 |
GHS Hazard Statements |
H290:Corrosive to Metals H302:Acute toxicity,oral H314:Skin corrosion/irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
Precautionary Statement Codes |
P234:Keep only in original container. P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Methanesulfonic acid
InChIKey | AFVFQIVMOAPDHO-UHFFFAOYSA-N |
Abamectin manufacturer
sheetalchemicals
SUJALAM CHEMICALS
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Glindia Chemicals
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