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Boc-L-phenylalanine methyl ester

Also known as: Boc-Phe-OMe, Boc-L-Phe-OMe, N-(tert-Butoxycarbonyl)-L-phenylalanine methyl ester, Methyl N-(tert-butoxycarbonyl)-L-phenylalaninate, methyl (2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoate, MFCD00076977, L-Boc-Phenyl-alanine methyl ester, BOC-L-PHENYLALANINE METHYL ESTER, Boc-L-phenylalaninemethylester

Boc-L-phenylalanine methyl ester (CAS 51987-73-6) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C15H21NO4 and a molecular weight of 279.332 g/mol. Key properties include a melting point of 36-40 °C(lit.), a boiling point of 403.8±38.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 198.0±26.8 °C. It is classified under GHS with signal word Warning and hazard statements H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
51987-73-6
Jingsj CID
J-48831-3
Molecular Formula
C15H21NO4
Molecular Weight
279.332 g/mol
Category
Organic Acids
Last updated
8/21/2026

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Physicochemical Properties

Melting Point36-40 °C(lit.)
Boiling Point403.8±38.0 °C at 760 mmHg
Density1.1±0.1 g/cm3
Flash Point198.0±26.8 °C
Exact Mass279.147064
PSA64.63000
LogP3.38
Vapor Pressure0.0±0.9 mmHg at 25°C
Refractive Index1.505

GHS Safety & Compliance

IrritantSignal word: Warning
  • H319 — Causes serious eye irritation

Activity & Biological Data

Additional Information[1]. Luckose F, et al. Effects of amino acid derivatives on physical, mental, and physiological activities. Crit Rev Food Sci Nutr. 2015;55(13):1793-897.

Customs & Trade Information

HS Code2924299090
Summary2924299090. other cyclic amides (including cyclic carbamates) and their derivatives; salts thereof. 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 Boc-L-phenylalanine methyl ester?

The CAS number of Boc-L-phenylalanine methyl ester is 51987-73-6.

What are the molecular formula and molecular weight of Boc-L-phenylalanine methyl ester?

Boc-L-phenylalanine methyl ester has molecular formula C15H21NO4 and molecular weight 279.332 g/mol.

Is Boc-L-phenylalanine methyl ester hazardous?

Boc-L-phenylalanine methyl ester has GHS signal word Warning and hazard statements H319 — Causes serious eye irritation.

What are the upstream and downstream products of Boc-L-phenylalanine methyl ester?

For Boc-L-phenylalanine methyl ester, Upstream Products: Di-tert-butyl dicarbonate, L-Phenylalanine methyl ester hydrochloride, N-(tert-Butoxycarbonyl)-L-phenylalanine; Downstream Products: Boc-N-methyl-L-phenylalanine, (S)-2-((tert-Butoxycarbonyl)amino)-3-phenylpropyl 4-methylbenzenesulfonate, N-Acetyl-L-phenylalanine methyl ester.

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

Last updated:

How to cite: Jingsj. "Boc-L-phenylalanine methyl ester (CAS 51987-73-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-48831-3 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.