N-(p-Toluenesulfonyl)-L-phenylalanine (CAS 13505-32-3) chemical structure

VAQORA

API ImpuritiesReference StandardAvailable on request

N-(p-Toluenesulfonyl)-L-phenylalanine

Name: N-(p-Toluenesulfonyl)-L-phenylalanine
Brand: Vaqora Chemicals
SKU: VQ-035778

Synonyms: N-p-Tosyl-L-Phenylalanine · n-tosyl-(s)-phenylalanine · N-((4-Methylphenyl)sulfonyl)-L-phenylalanine · N-[(4-methylphenyl)sulfonyl]-L-phenylalanine

CAS No.13505-32-3

FormulaC₁₆H₁₇NO₄S

Mol. weight319.40

Catalogue No.VQ-035778

PurityReference Standard

HSN38229090

N-(p-Toluenesulfonyl)-L-phenylalanine (CAS 13505-32-3) – Eribulin impurity standard. C16H17NO4S, MW 319.4. Vaqora Chemicals: COA, global shipping.

Pack sizesPrice on quotation · bulk available

10 mg

25 mg

50 mg

100 mg

Bulk / custom pack · kg to MT

Enquire

Batch COA with every lot

16-section GHS SDS

Export to 120+ countries

DG-compliant packing

About N-(p-Toluenesulfonyl)-L-phenylalanine

N-(p-Toluenesulfonyl)-L-phenylalanine is an impurity of Eribulin carrying the CAS registry number 13505-32-3. Its molecular formula is C16H17NO4S and its molecular weight is 319.4 g/mol. Systematically, it is named (2S)-2-[(4-methylphenyl)sulfonylamino]-3-phenylpropanoic acid. Alternative names: N-p-Tosyl-L-Phenylalanine and n-tosyl-(s)-phenylalanine.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. It carries the GHS signal word “Danger” with 1 hazard statement. Review the Safety Data Sheet before use.

This Eribulin impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. It is used across pharmaceutical manufacturing and academic and industrial research.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Eribulin

View every impurity, metabolite and intermediate we list for Eribulin.

Eribulin impurities

Specifications & identifiers

Chemical identifiers
Product name	N-(p-Toluenesulfonyl)-L-phenylalanine
Catalogue No.	VQ-035778
CAS Number	13505-32-3
IUPAC name	(2S)-2-[(4-methylphenyl)sulfonylamino]-3-phenylpropanoic acid
Molecular formula	C₁₆H₁₇NO₄S
Molecular weight	319.4 g/mol
Exact mass	319.0878
Grade	Reference Standard
HSN code	38229090
InChIKey	CGRCVIZBNRUWLY-HNNXBMFYSA-N
SMILES	CC1=CC=C(C=C1)S(=O)(=O)N[C@@H](CC2=CC=CC=C2)C(=O)O
PubChem CID	99327

Physical properties
Physical form	Solid
LogP (XLogP3)	2.8
H-bond donors / acceptors	2 / 5
TPSA	91.9 Å²
Synonyms	N-p-Tosyl-L-Phenylalanine, n-tosyl-(s)-phenylalanine, N-((4-Methylphenyl)sulfonyl)-L-phenylalanine, N-[(4-methylphenyl)sulfonyl]-L-phenylalanine, L-Phenylalanine, N-((4-methylphenyl)sulfonyl)-, N-(p-Toluenesulfonyl)-(S)-phenylalanine, L-Phenylalanine, N-[(4-methylphenyl)sulfonyl]-, Tos-Phe-OH, Tosyl-L-phenylalanine, n-tosyl-l-phenylalanine, Phenylalanine, N-[(4-methylphenyl)sulfonyl]-, (2S)-2-(4-methylbenzenesulfonamido)-3-phenylpropanoic acid

Safety & hazard information (GHS)

Toxic

Signal word: Danger

Hazard statements

H301Toxic if swallowed

Precautionary statements: P264, P270, P301 + P316, P321, P330, 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-(p-Toluenesulfonyl)-L-phenylalanine?

The CAS Registry Number of N-(p-Toluenesulfonyl)-L-phenylalanine is 13505-32-3. It is also known as N-p-Tosyl-L-Phenylalanine, n-tosyl-(s)-phenylalanine, N-((4-Methylphenyl)sulfonyl)-L-phenylalanine.

What is the molecular formula and molecular weight of N-(p-Toluenesulfonyl)-L-phenylalanine?

N-(p-Toluenesulfonyl)-L-phenylalanine has the molecular formula C16H17NO4S and a molecular weight of 319.4 g/mol. Its IUPAC name is (2S)-2-[(4-methylphenyl)sulfonylamino]-3-phenylpropanoic acid.

What is N-(p-Toluenesulfonyl)-L-phenylalanine used for?

N-(p-Toluenesulfonyl)-L-phenylalanine is supplied as a characterised reference material related to Eribulin. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of N-(p-Toluenesulfonyl)-L-phenylalanine can I order?

We supply N-(p-Toluenesulfonyl)-L-phenylalanine in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with N-(p-Toluenesulfonyl)-L-phenylalanine?

Yes. Every lot of N-(p-Toluenesulfonyl)-L-phenylalanine 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-(p-Toluenesulfonyl)-L-phenylalanine be shipped internationally?

Yes. N-(p-Toluenesulfonyl)-L-phenylalanine 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.