PHENYLALANINE- ▸ Aspartame raw material: Feedstock (with L-aspartic acid) for aspartame manufacture.
- ▸ Nutritional supplement: Amino-acid ingredient for supplements and foods.
- ▸ Flavoring agent: Food flavoring ingredient.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
Request SDS →L-Phenylalanine (CAS 63-91-2) is an essential aromatic alpha-amino acid (C9H11NO2). Its principal application is as a raw material, with L-aspartic acid, in the manufacture of the sweetener aspartame; it is also used as a nutritional supplement and food flavoring ingredient.
Regulatory & registration requirements
- TSCA (US):
- REACH (EU):
- EC number: 200-568-1
Source: EPA TSCA Inventory (July 2025 release) · ECHA CHEM — retrieved 2026-07-12
Frequently Asked Questions
What is L-Phenylalanine used for?
L-Phenylalanine (CAS 63-91-2) is an essential aromatic alpha-amino acid (C9H11NO2). Its principal industrial application is as a raw material, together with L-aspartic acid, in the manufacture of the sweetener aspartame; it is also used as an amino-acid ingredient in supplements and foods and as a food flavoring ingredient.
How is L-Phenylalanine used to make aspartame?
It is one of the two amino-acid feedstocks for aspartame, which is the methyl ester of the L-aspartyl-L-phenylalanine dipeptide. L-phenylalanine supplies the aromatic half of that dipeptide.
What is the difference between L-phenylalanine and DL-phenylalanine?
L-phenylalanine is the single L-enantiomer; DL-phenylalanine is a racemic mixture of the L- and D-forms. This product is the L-form, which is the configuration used in aspartame manufacture and food applications.
What is the CAS number, formula, and HS code?
CAS 63-91-2, formula C9H11NO2, HS 2922.49 (amino-acids and their salts, other). Lot-specific Certificate of Analysis and SDS are available on request.
What bulk packaging and order quantities are available?
It is distributed as a food/industrial-grade amino-acid ingredient in bulk packaging for manufacturing. Submit your target volume and documentation needs through a bulk RFQ for current pricing, pack sizes, and lead time.
What is the REACH and TSCA regulatory status of L-Phenylalanine (Phenylalanine)?
L-Phenylalanine (Phenylalanine) (CAS 63-91-2) is subject to U.S. TSCA Inventory requirements; supplying it into the EU requires valid REACH registration ((EC) No 1907/2006). RawSource cannot verify a third-party supplier's registrations — buyers should require documented TSCA and REACH compliance for their jurisdiction and volume (EC 200-568-1).