n-Butyl tosylate

About n-Butyl tosylate

n-Butyl tosylate is an organosulfur compound carrying the CAS registry number 778-28-9. Its molecular formula is C11H16O3S and its molecular weight is 228.31 g/mol. Systematically, it is named butyl 4-methylbenzenesulfonate. Alternative names: Butyl p-toluenesulfonate and Butyl tosylate.

Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Key uses span organic synthesis and API synthesis. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 100 mg, 250 mg, 1 g and 5 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation. Custom pack sizes, bulk quantities and specific analytical data can be arranged on request.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	n-Butyl tosylate
Catalogue No.	VQ-051030
CAS Number	778-28-9
IUPAC name	butyl 4-methylbenzenesulfonate
Molecular formula	C₁₁H₁₆O₃S
Molecular weight	228.31 g/mol
Exact mass	228.082
InChIKey	QYJXDIUNDMRLAO-UHFFFAOYSA-N
SMILES	CCCCOS(=O)(=O)C1=CC=C(C=C1)C
PubChem CID	13066

Physical properties
Physical form	Other
LogP (XLogP3)	2.7
H-bond donors / acceptors	0 / 3
TPSA	51.8 Å²
Synonyms	Butyl p-toluenesulfonate, Butyl tosylate, Butyl p-methylbenzenesulfonate, Benzenesulfonic acid, 4-methyl-, butyl ester, Butyl-p-toluenesulfonate, Butyl toluene-4-sulphonate, p-Toluene sulfonic acid, butyl ester, Butyl ptosylate, Butylptoluenesulfonate, nButyl ptoluenesulfonate, Butyl toluene4sulphonate, Butyl pmethylbenzenesulfonate

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of n-Butyl tosylate?

The CAS Registry Number of n-Butyl tosylate is 778-28-9. It is also known as Butyl p-toluenesulfonate, Butyl tosylate, Butyl p-methylbenzenesulfonate.

What is the molecular formula and molecular weight of n-Butyl tosylate?

n-Butyl tosylate has the molecular formula C11H16O3S and a molecular weight of 228.31 g/mol. Its IUPAC name is butyl 4-methylbenzenesulfonate.

Which grade and pack sizes of n-Butyl tosylate can I order?

We supply n-Butyl tosylate, in 100 mg, 250 mg, 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with n-Butyl tosylate?

Yes. Every lot of n-Butyl tosylate is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can n-Butyl tosylate be shipped internationally?

Yes. n-Butyl tosylate is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.