64280 Sigma-Aldrich

Methanesulfonic acid

≥99.0%, ReagentPlus®



Related Categories Acids, Acids & Bases, Analytical Reagents, Analytical/Chromatography, Application Specific Reagents,
grade   ReagentPlus®
vapor density   3.3 (vs air)
vapor pressure   1 mmHg ( 20 °C)
assay   ≥99.0%
refractive index   n20/D 1.429(lit.)
  n20/D 1.429
bp   167 °C/10 mmHg(lit.)
mp   17-19 °C(lit.)
density   1.481 g/mL at 25 °C(lit.)
λ   neat
UV absorption   λ: 240-320 nm Amax: <0.4


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Legal Information

ReagentPlus is a registered trademark of Sigma-Aldrich Co. LLC

Other Notes

This product has been replaced by 471356-Sigma-Aldrich | Methanesulfonic acid, ≥99.5% | CH3SO3H

Price and Availability

Safety & Documentation

Safety Information

Signal word 
Hazard statements 
UN 3265 8 / PGII
WGK Germany 
Flash Point(F) 
372.2 °F
Flash Point(C) 
189 °C

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option:
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
I received Product 64280, Methanesulfonic acid, and it was a solid.
If the material is received as a solid, product 64280 is not compromised.  The material can be warmed to 25-30ºC to melt the solid.
What is the concentration of Product 64280, Methanesulfonic acid?
The product 64280 is not a solution, but the pure product.  To calculate the molarity of the material, one would use the density and molecular weight.  For methanesulfonic acid the molarity is ~15.4M.
What is Product 64280, Methanesulfonic acid, packaged in?
The product 64280 is going to be packaged in amber glass bottle for the 25mL, 100mL, and 500mL packaging size.
What type of containers should I avoid for Product 64280, Methanesulfonic acid?
The product 64280 is corrosive to iron, steel, brass, copper, and lead.
What can I dissolve Product 64280, Methanesulfonic acid, into?
Product 64280 can be dissolved in hexane, 26-28; benzene, 1.50; toluene, 0.38; o-chlorotoluene, 0.23; ethyl disulfide, 0.47; these values are in weight %.
How should Product 64280, Methanesulfonic acid, be handled?
We recommend to handle and store product 64280 in a dry inert atmosphere.  Please refer to the MSDS or Technical Bulletin AL-134 for additional handling information.
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