Methasulfocarb

磺菌威

Also known as: Kayabest, NK-191, S-[4-(methanesulfonyloxy)phenyl] methylcarbamothioate, S-[4-[(methylsulfonyl)oxy]phenyl] N-methylcarbamothioate, [4-(methylcarbamoylsulfanyl)phenyl] methanesulfonate, S-4-(mesyloxy)phenyl methyl(thiocarbamate), Methylcarbamothioic acid S-(4-((methylsulfonyl)oxy)phenyl) ester, Methylthiocarbamic acid S-[4-(methylsulfonyloxy)phenyl] ester, N-Methylthiocarbamic acid S-[4-(methylsulfonyloxy)phenyl] ester, Brn 2219123

Methasulfocarb (CAS 66952-49-6) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C9H11NO4S2 and a molecular weight of 261.31800 g/mol. It is also known as Kayabest, NK-191 and S-[4-(methanesulfonyloxy)phenyl] methylcarbamothioate. Key property: a density of 1.42g/cm3. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
66952-49-6
Jingsj CID
J-1976387-1
Molecular Formula
C9H11NO4S2
Chinese Name
磺菌威
Molecular Weight
261.31800 g/mol
Category
Organic Compounds
Last updated
8/21/2026

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Physicochemical Properties

Density1.42g/cm3
Exact Mass261.01300
PSA106.15000
LogP2.92820
Refractive Index1.6
Storage Conditions2-8℃

GHS Safety & Compliance

Acute Toxicity / Environmental HazardSignal word: Danger
  • H301 — Toxic if swallowed
  • H411 — Toxic to aquatic life with long lasting effects

Frequently Asked Questions

What is the CAS number of Methasulfocarb?

The CAS number of Methasulfocarb is 66952-49-6.

What are the molecular formula and molecular weight of Methasulfocarb?

Methasulfocarb has molecular formula C9H11NO4S2 and molecular weight 261.31800 g/mol.

Is Methasulfocarb hazardous?

Methasulfocarb has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H411 — Toxic to aquatic life with long lasting effects.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated:

How to cite: Jingsj. "Methasulfocarb (CAS 66952-49-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1976387-1 (accessed 2026-10-28).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.