Sulfonyl Chemicals

Overview

VARSAL’s sulfonyl chemical products are supplied through Varsal ISO-, GMP-, and ChemStewards®-compliant facilities.

We also support additional sulfonyl chemical requirements upon request. Please contact us with specific inquiries.

Product Index

Select a product to view technical details.

(CAS# 75-75-2)

(CAS# 7143-01-3)

(CAS# 1493-13-6)

(CAS# 358-23-6)

(CAS# 53408-94-9)

(CAS# 17570-76-2)

(CAS# 124-63-0)

(CAS# 3144-09-0)

(CAS# 624-92-0)

(CAS# 17012-98-5)

(CAS# 10147-36-1)

(CAS# 7790-94-5)

(CAS# 90076-65-6)

Methanesulfonic Acid (MSA)

Other names: Methylsulfonic Acid, Methylsulphonic Acid, Methanesulphonic Acid, MsOH
Molecular weight: 96.10
Appearance: colorless and transparent oil liquid
CAS#: 75-75-2
Notes: soluble in water; insoluble in paraffin

As a solvent, and a catalyst of alkylation, esterification and polymerization. MSA is also used to generate mesylate salts of APIs.

Varsal’s MSA process is clean with no methyl mercaptan odor, and our process conditions do not typically allow formation of methyl esters. It is approved for use in all major tin-lead applications, and low oxidizables and chlorides ensure long life, stable solder deposits. Varsal’s clean process promotes “Green Chemistry” with less environmental impact from sludge. It also provides superior throwing power to allow high-speed tin-lead alloy plating in reel-to-reel operations.

We offer a variety of different grades, and can customize to your specific technical requirements.

Methanesulfonic Acid, 70% Special Grade
Methanesulfonic Acid, 70% Industrial Grade
Methanesulfonic Acid, 85%
Methanesulfonic Acid, Anhydrous Pharma Grade
Methanesulfonic Acid, Anhydrous Special Grade
Methanesulfonic Acid, Anhydrous Industrial Grade

Methanesulfonic Anhydride (MSAA)

Other names: Methylsulfonic Anhydride, Methanesulphonic Anhydride, Mesyl Anhydride, Methylsulfonyl Methanesulfonate, Ms2O
Molecular weight: 174.20
Appearance: light gray crystals
CAS#: 7143-01-3
Notes: corrosive and moisture sensitive

Used as a reagent for various purposes, including to generate mesylates (methanesulfonyl esters) in aromatic alkylation reactions. It can be reacted with DMSO to obtain sulfoxonium complexes, which are useful oxidizing agents.

Varsal’s MSAA has extremely high purity with low residual impurities, leading to maximal yield and product quality for Varsal’s customers. Varsal has extensive expertise in logistics and packaging considerations when handling corrosive and moisture-sensitive products.

Trifluoromethanesulfonic ACID (Triflic ACID)

As a catalyst of alkylation, esterification and polymerization.

Enhanced Catalyst Longevity: High purity levels prevent catalyst poisoning, which can occur when trace contaminants interfere with active sites during synthesis

Superior Ionic Conductivity: Low Fluoride ion levels are critical for customers in the battery and electrolyte sectors. Excessive fluoride ions can lead to unwanted etching or corrosion in delicate electrochemical systems

Reduced Side Reactions: Maintaining low Sulfate levels ensures that there are fewer competing acidic species. This leads to higher yields and simpler purification steps for the final product

Trifluoromethanesulfonic ANHYDRIDE (Triflic ANHYDRIDE)

Used as a reagent for converting hydroxy groups to excellent triflate leaving groups, and ketones into enol triflates.

Enhanced Catalyst Longevity: High purity levels prevent catalyst poisoning, which can occur when trace contaminants interfere with active sites during synthesis

Superior Ionic Conductivity: Low Fluoride ion levels are critical for customers in the battery and electrolyte sectors. Excessive fluoride ions can lead to unwanted etching or corrosion in delicate electrochemical systems

Reduced Side Reactions: Maintaining low Sulfate levels ensures that there are fewer competing acidic species. This leads to higher yields and simpler purification steps for the final product

Tin Methanesulfonate (Sn-MSA)

Used as an electrolyte in metal-finishing, primarily as a replacement for tin sulfate where high speed, reel-to-reel deposits are needed.

Varsal offers both regular and low acid Sn-MSA at 300 g/L. Varsal also offers Sn-MSA at 400 g/L concentration. Varsal can custom manufacture low Pb or Pb-free Sn-MSA, and vary the free acid content of sulfonate solutions for specific plating tank requirements. Varsal can control the Pb and Fe specification, as well as the “Low Alpha” lead for sensitive electronic semiconductor applications.

Tin(II) Methane Sulfonate Solution
Tin(II) Methane Sulfonate Solution-Low Acid
Tin(II) Methane Sulfonate Solution-Low Lead
Tin(II) Methane Sulfonate Solution-Lead Free
Tin(II) Methane Sulfonate Solution, 300 g/L
Tin(II) Methane Sulfonate Solution, 400 g/L
Tin(II) Methane Sulfonate Solution, 400 g/L, Zero Acid

Lead Methanesulfonate (Pb-MSA)

Electrolyte in metal-finishing.

Varsal offers Pb-MSA at concentrations ranging from 300 g/L to 500 g/L, and can customize to your specific technical requirements.

Lead(II) Methane Sulfonate Solution, 500 g/L
Lead(II) Methane Sulfonate Solution, 450 g/L
Lead(II) Methane Sulfonate Solution, 400 g/L
Lead(II) Methane Sulfonate Solution, 350 g/L
Lead(II) Methane Sulfonate Solution, 300 g/L

Other Methanesulfonate Salts (MSA-Salts)

Typical products include Cu(II) Methane Sulfonate Solution (CAS# 54253-62-2), Silver Methane Sulfonate Solution (CAS# 2386-52-9), Ni(II) Methane Sulfonate Solution (CAS# 55136-38-4), and Bi(III) Methane Sulfonate Solution (CAS# 82617-81-0).

Electrolyte in metal-finishing; Silver methane sulfonate solution is used for high heat automotive applications.

Varsal custom manufactures other MSA salts per customer request. Some of the typical ones are listed in the Grades Offered section. For other inquiries, please contact us to learn more!

Methanesulfonyl Chloride (MSC)

Other names: Methylsulfonyl Chloride, Methanesulphonyl Chloride, Mesyl Chloride, MsCl
Molecular weight: 114.54
Appearance: colorless to pale yellow liquid
CAS#: 124-63-0
Notes: toxic, corrosive, inhalation hazard

Used as a building block for agricultural and pharmaceutical chemicals. MSC dissolves in polar organic solvents but is reactive toward water, alcohols, and many amines. The simplest organic sulfonyl chloride, it is used to make methanesulfonates and to synthesize sulfene.

Varsal’s MSC is made from the chlorination of DMDS. The manufacturing process is clean, with no methyl mercaptan odor and no detectable impurities of methyl methane thiosulfonate. In formulations, it is both harmless to humans and has impurity cleansing capabilities. Thus, MSC is ideal for pharmaceutical, flavors and fragrance, and other applications where these characteristics are important.

Varsal has extensive expertise in logistics, packaging and storage considerations when handling corrosive, toxic and inhalation hazard products.

Methanesulfonamide (MSAM)

Used as a pharmaceutical intermediate.

Varsal’s MSAM is made through a very clean manufacturing process and has extremely high purity with low residual impurities, leading to maximal yield and product quality for Varsal’s customers.

DIMETHYL DISULFIDE (DMDS)

DMDS is the simplest disulfide and used in a variety of applications. Representative uses are below:

As a sulfiding agent in the refinery process
For the protection of steam cracking coils against the formation of coke in petrochemical facilities
Blended with thiophene to impart gassy odor for petrochemical plant safety
As a soil fumigant in agriculture
As a food additive to substitute 2-methylfuran acrolein

Advantages of DMDS versus other sulfiding agents include high sulfur content, lower toxicity, lowest total cost, low decomposition temperature, and two-step decomposition.

Varsal’s DMDS is made from dimethyl sulfate, and this route is cleaner than the competing, highly dangerous and volatile methyl mercaptan process. Varsal’s DMDS is a purer product than other products in the market, which are more suitable as sulfiding agents in petrochemical cracker management.

4-Octylbenzenesulfonic acid (OBSA)

OBSA has a variety of uses, including as a wetting and hydrophobizing agent, as a dispersing agent, and for solubilizer, cleaner, detergent applications.

Varsal’s OBSA is made through a very clean manufacturing process and has extremely high purity with low residual impurities, leading to maximal yield and product quality for Varsal’s customers.

Varsal custom-manufactures OBSA salts such as sodium 4-octylbezenesulfonate (NaOBS; CAS# 6149-03-7) per customer request.

PROPANESULFONYL CHLORIDE (PSC)

PSC has a variety of uses, including in the synthesis of 1-alkyl-3-methylimidazolium alkanesulfonate ionic liquids.

Varsal’s PSC is made through a very clean manufacturing process and has extremely high purity with low residual impurities, leading to maximal yield and product quality for Varsal’s customers.

Chlorosulfuric acid (CSA)

CSA has a variety of uses, including in organic synthesis as a sulfating, sulfonating or chlorosulfonating agent. It is preferred in many applications because it is a strong agent that is less destructive than sulfur trioxide.

Varsal’s CSA is made through a very clean manufacturing process and has extremely high purity with low residual impurities, leading to maximal yield and product quality for Varsal’s customers.

Lithium bis(trifluoromethanesulphonyl)imide (LiTFSI)

Primarily used as a high-performance electrolyte in lithium-ion, lithium-sulfur, and solid-state batteries. It is favored for its exceptional thermal stability and ionic conductivity, often serving as a key component in ionic liquids and as a Lewis Acid catalyst in organic synthesis.

Varsal’s LITFSI product demonstrates a high level of purity and quality that aligns with the stringent requirements for advanced electrochemical applications. Key advantages include an exceptionally high purity level, extremely low moisture levels which is critical for its use in moisture-sensitive lithium-ion and solid-state battery environments, as well as minimal metallic impurities, ensuring high performance and stability in specialized industrial and energy storage applications.