Methanesulfonic Acid
CAS Number: 75-75-2
Chemical Formula: CH4O3S
Synonyms:
METHANE SULFONIC ACID 70%
acidemethanesulfonique
kyselinamethansulfonova
Appearance: Colorless transparent liquid
HS Code: 29011000
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of Methanesulfonic acidCAS#75-75-2
Methanesulfonic acid is a colorless, clear liquid with strong acidity. It serves as an efficient organic catalyst and solvent, widely applied in electroplating, organic synthesis, and pharmaceutical manufacturing. It is water‑soluble and thermally stable under normal conditions, making it suitable for many industrial reactions. It acts as a cleaning agent, electrolyte component, and esterification catalyst, with low volatility and environmental compatibility.
Parameters
| Melting point | -95 °C |
| Boiling point | 68.95 °C(lit.) |
| density | 0.659 g/mL at 25 °C(lit.) |
| vapor density | 3.5 (vs air) |
| vapor pressure | 40 mm Hg ( 20 °C) |
| refractive index | n20/D 1.388 |
| Fp | 30 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | Very soluble in ethanol, ethyl ether and chloroform. |
| form | Liquid |
| pka | >14 (Schwarzenbach et al., 1993) |
| color | Colorless |
| Specific Gravity | 0.660 (20/4℃) |
| Odor | Mild gasoline-like odor detectable at 65 to 248 ppm |
| Relative polarity | 0.009 |
| PH | 7 |
| Odor Threshold | 1.5ppm |
| explosive limit | 1.0-8.1%(V) |
| Water Solubility | insoluble |
| λmax | λ: 200 nm Amax: ≤0.70; λ: 225 nm Amax: ≤0.10; λ: 250 nm Amax: ≤0.01 |
| Merck | 14,4694 |
| BRN | 1730733 |
| Henry’s Law Constant | 0.238, 0.413, 0.883, 0.768, and 1.56 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al., 1988) |
| Dielectric constant | 2.0（-90℃） |
| Exposure limits | TLV-TWA 50 ppm (～175 mg/m³) (ACGIH), 500 ppm (～1750 mg/m³) (OSHA); IDLH 5000 ppm (NIOSH). |
| Stability: | Stable. Incompatible with oxidizing agents, chlorine, fluorine, magnesium perchlorate. Highly flammable. Readily forms explosive mixtures with air. Note low flash point. |
| InChIKey | VLKZOEOYAKHREP-UHFFFAOYSA-N |
| LogP | 4 at 20℃ and pH7 |
| Surface tension | 18.52mN/m at 293.15K |
| CAS DataBase Reference | 110-54-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Hexane(110-54-3) |
| EPA Substance Registry System | Hexane (110-54-3) |
Safety Information
| Hazard Codes | F,Xn,N |
| Risk Statements | 11-38-50/53-65-67-62-51/53-48/20-36/37/38 |
| Safety Statements | 9-16-29-33-60-61-62-36/37-45-36/37/39-53-26 |
| RIDADR | UN 3295 3/PG 2 |
| OEB | A |
| OEL | TWA: 50 ppm (180 mg/m3) |
| WGK Germany | 3 |
| RTECS | MN9275000 |
| F | 3-10 |
| Autoignition Temperature | 225 °C |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29011000 |
| Hazardous Substances Data | 110-54-3(Hazardous Substances Data) |
| Toxicity | LC50 (4 hr) in mice by inhalation: 48000 ppm; LD50 orally in rats: 32.0 g/kg (Couri, Milks) |
| IDLA | 1,100 ppm [10% LEL] |
Product Application of Methanesulfonic acid CAS#75-75-2
Methanesulfonic acid is widely used in organic synthesis, electroplating electrolytes, and pharmaceutical production. It functions as a strong acid catalyst, cleaning agent, and solvent in industrial processes. It is also applied in resin manufacturing, electrolyte preparation, and chemical refining.
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