(2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid

Also known as: Cyclo(-Asp-Phe), Cyclo(L-Asp-L-Phe), Aspartame Related Compound A, Aspartame Impurity 1 (Aspartame EP Impurity A), 2-[(2S,5S)-5-benzyl-3,6-dioxopiperazin-2-yl]acetic acid, 2-[(2S,5S)-3,6-dioxo-5-(phenylmethyl)piperazin-2-yl]acetic acid, (2S,5S)-3,6-Dioxo-5-(phenylmethyl)-2-piperazineacetic acid, 5-Benzyl-3,6-dioxo-2-piperazineacetic acid, MFCD00190764

(2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid (CAS 5262-10-2) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C13H14N2O4 and a molecular weight of 262.26100 g/mol. Key properties include a melting point of 270-272ºC(lit.), a boiling point of 667.4ºC at 760mmHg, a density of 1.298g/cm3 and a flash point of 357.4ºC. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 5262-10-2
Jingsj CID: J-24408-6
Molecular Formula: C₁₃H₁₄N₂O₄
Molecular Weight: 262.26100 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	270-272ºC(lit.)
Boiling Point	667.4ºC at 760mmHg
Density	1.298g/cm3
Flash Point	357.4ºC
Exact Mass	262.09500
PSA	95.50000
LogP	0.34460
Refractive Index	1.561

GHS Safety & Compliance

IrritantSignal word: Warning

H315 — Causes skin irritation
H319 — Causes serious eye irritation
H335 — May cause respiratory irritation

Customs & Trade Information

HS Code	2933599090
Summary	2933599090. other compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid?

The CAS number of (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid is 5262-10-2.

What are the molecular formula and molecular weight of (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid?

(2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid has molecular formula C13H14N2O4 and molecular weight 262.26100 g/mol.

Is (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid hazardous?

(2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid?

For (2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid, Upstream Products: Aspartame, Methyl L-phenylalaninate.

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. "(2S,5S)-5-Benzyl-3,6-dioxo-2-piperazineacetic acid (CAS 5262-10-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24408-6 (accessed 2026-11-09).

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