(S)-(-)-Methyl p-tolyl sulfoxide

(S)-(-)-甲基对甲苯亚砜

Also known as: (S)-Methyl 4-tolyl sulfoxide, (S)-Methyl p-methylphenyl sulfoxide, (S)-p-Methylphenyl methyl sulfoxide, (S)-p-Tolyl methyl sulfoxide, 1-Methyl-4-[(S)-methylsulfinyl]benzene, MFCD00151503, S-(4-Methylphenyl) methyl sulfoxide

(S)-(-)-Methyl p-tolyl sulfoxide (CAS 5056-07-5) is a compound in the Solvents category listed in the Jingsj chemical database. It has the molecular formula C8H10OS and a molecular weight of 154.22900 g/mol. It is also known as (S)-Methyl 4-tolyl sulfoxide, (S)-Methyl p-methylphenyl sulfoxide and (S)-p-Methylphenyl methyl sulfoxide. Key properties include a melting point of 75-77ºC(lit.), a boiling point of 282.403ºC at 760 mmHg, a density of 1.16g/cm3 and a flash point of 124.593ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5056-07-5
Jingsj CID: J-25778-9
Molecular Formula: C₈H₁₀OS
Chinese Name: (S)-(-)-甲基对甲苯亚砜
Molecular Weight: 154.22900 g/mol
Category: Solvents
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	75-77ºC(lit.)
Boiling Point	282.403ºC at 760 mmHg
Density	1.16g/cm3
Flash Point	124.593ºC
Exact Mass	154.04500
PSA	36.28000
LogP	2.59810
Refractive Index	1.59

Customs & Trade Information

HS Code	2930909090
Summary	2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of (S)-(-)-Methyl p-tolyl sulfoxide?

The CAS number of (S)-(-)-Methyl p-tolyl sulfoxide is 5056-07-5.

What are the molecular formula and molecular weight of (S)-(-)-Methyl p-tolyl sulfoxide?

(S)-(-)-Methyl p-tolyl sulfoxide has molecular formula C8H10OS and molecular weight 154.22900 g/mol.

What are the upstream and downstream products of (S)-(-)-Methyl p-tolyl sulfoxide?

For (S)-(-)-Methyl p-tolyl sulfoxide, Downstream Products: p-Tolyl disulfide, 1-Methyl-4-(methylsulfonyl)benzene, methyl p-tolyl sulfoxide.

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

Last updated: 8/21/2026

How to cite: Jingsj. "(S)-(-)-Methyl p-tolyl sulfoxide (CAS 5056-07-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-25778-9 (accessed 2026-10-28).

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