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Methanesulfonic acid

Methanesulfonate electroplating solution Chemical properties Uses Production method Category Toxicity classification Acute toxicity Flammability and Hazardous properties Storage and transportation characteristics Fire extinguishing agent
Methanesulfonic acid
Methanesulfonic acid
Chemical Name:
Methanesulfonic acid
MSA;TDH2A;MCAT 1201;Mesic acid;LutropurMSA;SULFOMETHANE;Sulphonethane;Methansulfonsure;METHYLSULFONIC ACID;Methylsulphonicacid
Molecular Formula:
Formula Weight:
MOL File:

Methanesulfonic acid Properties

Melting point:
19 °C
Boiling point:
167 °C10 mm Hg(lit.)
1.481 g/mL at 25 °C(lit.)
vapor density 
3.3 (vs air)
vapor pressure 
1 mm Hg ( 20 °C)
refractive index 
n20/D 1.429(lit.)
Flash point:
>230 °F
storage temp. 
water: soluble1,000 g/L at 20°C
-2.6(at 25℃)
Water Solubility 
Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins.
Light Sensitive & Hygroscopic
Stable. Moisture sensitive. Incompatible with amines, bases, water, common metals. Releases a substantial amount of heat when diluted with water (add acid to water with care if diluting).
CAS DataBase Reference
75-75-2(CAS DataBase Reference)
NIST Chemistry Reference
EPA Substance Registry System
Methanesulfonic acid(75-75-2)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  C
Risk Statements  34-22-21/22-35
Safety Statements  26-36-45-1/2-36/37/39
RIDADR  UN 3265 8/PG 2
WGK Germany  1
RTECS  PB1140000
HazardClass  8
PackingGroup  III
HS Code  29041000
Hazardous Substances Data 75-75-2(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H290 May be corrosive to metals Corrosive to Metals Category 1 Warning P234, P390, P404
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
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.
P405 Store locked up.

Methanesulfonic acid price More Price(30)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 471348 Methanesulfonic acid solution 70 wt. % in H2O 75-75-2 1l $70.1 2018-11-13 Buy
Sigma-Aldrich 11317 Methanesulfonic acid PharmaGrade, Manufactured under appropriate GMP controls for pharma or biopharmaceutical production 75-75-2 1kg $3892 2018-11-13 Buy
TCI Chemical M0093 Methanesulfonic Acid >99.0%(T) 75-75-2 25g $16 2017-12-01 Buy
TCI Chemical M0093 Methanesulfonic Acid >99.0%(T) 75-75-2 500g $74 2017-12-01 Buy
Alfa Aesar A13565 Methanesulfonic acid, 98+% 75-75-2 100g $25 2018-11-13 Buy

Methanesulfonic acid Chemical Properties,Uses,Production

Methanesulfonate electroplating solution

Methanesulfonic acid is a caustic chemical, briefly referred to as MSA. It has broad application prospect in the field of electroplating and has proved to be an excellent alternative of fluoride boric acid or phenolsulfonic acid.
Methanesulfonate electroplating solution has been applied to tin and tin-lead alloy plating, the product features are as follows:
1. The bright pure tin electroplating of the methanesulfonic acid type with the coating crystal being meticulous, even and exhibiting bright silver-white. It has excellent weldability, being suitable in the electronics profession.
2. The plating solution has a high plating rate, a wide range of current density, faster deposition rate, and excellent deep plating capacity.
3. After the standard aging test or long-term storage, it can still maintain good welding performance.
4. It contains no fluorine boric acid with easy wastewater treatment, low corrosion, being environmentally friendly.

Chemical properties

It appears as colorless or slightly brown oily liquid, appearing as solid at low temperatures. It has a melting temperature of 20 °C, the boiling point of 167 °C (13.33 kPa), 122 °C (0.133 kPa),  the relative density of 1.4812 (18 ℃) and refractive index 1.4317 (16 ℃). It is soluble in water, alcohol and ether, insoluble in alkanes, benzene and toluene. It will not subject to decomposition in boiling water and hot alkaline solution. It also has strong corrosion effect against the metal iron, copper and lead.


Methanesulfonic acid is a raw material for medicine and pesticide. It can also be used as dehydrating agent, curing accelerator for coating, treating agent for fiber, solvent, catalysis, and esterification as well as polymerization reaction.
It can be used as solvent, alkylation, catalyst of esterification and polymerization, also used in medicine and electroplating industry. It can also be applied to oxidation.

Production method

It can be obtained through the nitrate oxidation of thiocyanate methyl. Nitric acid and negative water are heated carefully to 80-88 °C with fractional addition of methyl thiocyanate and the temperature being automatically rose to about 105 ℃. After the reaction becomes mild, the reaction was heated to 120 ° C and reacted for 5 hours to obtain a crude product. The crude product was diluted with exchanged water and adjusted to pH 8-9 by addition of 25% barium hydroxide solution and filtered. The filtrate is condensed to until crystalline precipitation. The crystal is washed by methanol to remove the nitrate to obtain the barium methanesulfonate. It is then added to the exchanged water to boiling, add sulfuric acid for decomposition while it is hot, filter and the filtrate was concentrated under vacuum to no water to obtain the finished product.
Another method is that the methyl isothiourea sulfate is successively subject to chlorination, oxidation and hydrolysis to derive the finished product. Methyl isothiourea sulfate was added to the water; and the chlorine is sent into at 20-25 ° C to until phenomenon such as solution color is turned into yellow; oil layer emerges in the bottom of the bottle; the temperature drop and large number of residual chlorine is discharged from the exhaust pipe; this indicates the end point of the reaction. The reaction solution was extracted with chloroform. After drying, the extract was distilled at 60-62 ° C under normal pressure to remove the chloroform, and then further subject to distillation under reduced pressure. Collect the 60-65 °C (2.67 kPa) fraction was to obtain the methanesulfonyl chloride. Add the base drop wise under stirring to 80 ℃ hot water and maintain the heat hydrolysis for about 2h, to until the reaction liquid droplets completely disappear. The reaction solution was concentrated under reduced pressure to a syrupy form, diluted with water, and concentrated under reduced pressure to until no more water was distilled off to obtain methanesulfonic acid.


Corrosive items

Toxicity classification

highly toxic

Acute toxicity

Oral-rat LDL0: 200 mg/kg

Flammability and Hazardous properties

Flammable with thermal decomposition of toxic formaldehyde and sulfur dioxide smoke

Storage and transportation characteristics

Treasury: ventilated, low-temperature, dry; store it separately from oxidants and alkali.

Fire extinguishing agent

sand, foam, mist water

Chemical Properties

colourless or light yellow liquid


ChEBI: An alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl.

Purification Methods

Dry the acid, either by azeotropic removal of water with *benzene or toluene, or by stirring 20g of P2O5 with 500mL of the acid at 100o for 0.5hours. Then distil it under vacuum and fractionally crystallise it by partial freezing. Sulfuric acid, if present, can be removed by prior addition of Ba(OH)2 to a dilute solution, filtering off the BaSO4 and concentrating under reduced pressure; and is sufficiently pure for most applications. [Beilstein 4 IV 10.]

Methanesulfonic acid Preparation Products And Raw materials

Raw materials

Preparation Products

Methanesulfonic acid Suppliers

Global( 318)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1465 55
Capot Chemical Co.,Ltd.
+86 (0)571-855 867 18
+86 (0)571-858 647 95 China 19954 60
Shenzhen Sendi Biotechnology Co.Ltd.
0755-23311925 18102838259
0755-23311925 CHINA 3218 55
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22119 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
Shanghai Time Chemicals CO., Ltd.
+86-021-57951555 CHINA 1374 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32764 55
career henan chemical co
+86-371-86658258 CHINA 10011 58
Taizhou Sunny Chemical Co.,Ltd +86-523-86920899 13951172783
+86-523-86926789 China 13 62
Tangshan Moneide Trading Co., Ltd. +86-315-8309571
+86-315-7726572 China 689 57

View Lastest Price from Methanesulfonic acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-08-06 Methanesulfonic acid
US $1.00 / KG 1KG 98% 1

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