N-(tert-Butoxycarbonyl)-L-phenylalanine

Also known as: Boc-L-phenylalanine, Boc-Phe-OH, N-Boc-L-phenylalanine, N-(tert-Butoxycarbonyl)-L-phenylalanine, Boc-phenylalanine, (2S)-2-(tert-Butoxycarbonylamino)-3-phenylpropionic acid, (S)-2-((tert-Butoxycarbonyl)amino)-3-phenylpropanoic acid, N-α-t-BOC-L-phenylalanine, N-t-Butyloxycarbonyl-L-phenylalanine, N-tert-Butyloxycarbonyl-L-phenylalanine, L-Phenylalanine, N-[(1,1-dimethylethoxy)carbonyl]-, MFCD00002663, EINECS 237-305-5

N-(tert-Butoxycarbonyl)-L-phenylalanine (CAS 13734-34-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C14H19NO4 and a molecular weight of 265.31 g/mol. Key properties include a melting point of 85-87 °C(lit.), a boiling point of 426.6±38.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 211.8±26.8 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 13734-34-4
Jingsj CID: J-8285-9
Molecular Formula: C₁₄H₁₉NO₄
Molecular Weight: 265.31 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	85-87 °C(lit.)
Boiling Point	426.6±38.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	211.8±26.8 °C
Exact Mass	265.131409
PSA	75.63000
LogP	2.96
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.528

Customs & Trade Information

HS Code	2924299090
Summary	2924299090. 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 N-(tert-Butoxycarbonyl)-L-phenylalanine?

The CAS number of N-(tert-Butoxycarbonyl)-L-phenylalanine is 13734-34-4.

What are the molecular formula and molecular weight of N-(tert-Butoxycarbonyl)-L-phenylalanine?

N-(tert-Butoxycarbonyl)-L-phenylalanine has molecular formula C14H19NO4 and molecular weight 265.31 g/mol.

What are the upstream and downstream products of N-(tert-Butoxycarbonyl)-L-phenylalanine?

For N-(tert-Butoxycarbonyl)-L-phenylalanine, Upstream Products: L-Phenylalanine, Di-tert-butyl dicarbonate, N-Boc-L-phenylalaninol; Downstream Products: Boc-N-methyl-L-phenylalanine, Boc-beta-cyclohexyl-L-alanine dicyclohexylammonium salt, Substance P.

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

Last updated: 8/21/2026

How to cite: Jingsj. "N-(tert-Butoxycarbonyl)-L-phenylalanine (CAS 13734-34-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-8285-9 (accessed 2026-11-09).

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