Molekula
L-Phenylalanine
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
L-Phenylalanine is an essential amino acid used in protein synthesis and as a precursor for neurotransmitters like dopamine and norepinephrine. It is also used in food and pharmaceutical applications as a nutritional supplement. CAS: 63-91-2, Molecular formula: C9H11NO2, Molecular weight: 165.19, Storage: Ambient, Signal word: None. Molekula supplies L-Phenylalanine from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
In stock — same-day dispatch
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — £23.00 per pack ex VAT · £27.60 inc. VAT
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1 kg — £108.90 per pack ex VAT · £130.68 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White crystalline powder |
| Water | Report |
| Specific rotation | -20.4 to -35.2° |
| Heavy metals | ≤ 0.002% |
| pH | 5.4 - 6 |
| Loss on Drying | ≤ 0.40% |
| Assay | 98.5 - 101.5% |
| Residue on Ignition | ≤ 0.10% |
| Lead (Pb) | ≤ 10mg/kg |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Prisms form water |
| Odour | Slight |
| Melting Point | 283 °C decomposes |
| Boiling Point | 295 °C at 760 mmHg (sublimes) |
| Water Solubility | 26.4 g/L at 25 °C |
| Solubility (other solvents) | Soluble in water; Slightly soluble in dilute mineral acid and alkali hydroxide solutions |
| Vapour Pressure | 0.00000005 mmHg |
| pKa | pKa = 1.24 (at 25 °C) |
| log P (octanol/water) | -1.38 |
Source: PubChem CID 6140 (HSDB, CAMEO Chemicals, Joint FAO/WHO Expert Committee on Food Additives (JECFA), Haz-Map, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 14133876 |
| CAS Number | 63-91-2 |
| IUPAC Name | (2S)-2-amino-3-phenylpropanoic acid |
| EC Number | 200-568-1 |
| Molecular Formula | C9H11NO2 |
| Molecular Weight | 165.19 |
| Exact Mass | 165.079 |
| SMILES | C1=CC=C(C=C1)C[C@@H](C(=O)O)N |
| InChIKey | COLNVLDHVKWLRT-QMMMGPOBSA-N |
| InChI | InChI=1S/C9H11NO2/c10-8(9(11)12)6-7-4-2-1-3-5-7/h1-5,8H,6,10H2,(H,11,12)/t8-/m0/s1 |
| PubChem CID | 6140 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| Tariff Code | 29224985 |
Safety & GHS
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P410 Protect from sunlight
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- (2S)-2-amino-3-phenylpropanoic acid
- (S)-2-Amino-3-phenylpropanoic acid
- (S)-2-Amino-3-phenylpropionic acid
- (S)-Phenylalanine
- 3-Phenyl-L-alanine
- 3-Phenylalanine
- Antibiotic FN 1636
- beta-Phenyl-L-alanine
- L-Alanine, phenyl-
- phenylalanine
Frequently asked questions
What is L-Phenylalanine used for?
L-Phenylalanine is used as a nutritional supplement, a precursor in the synthesis of neurotransmitters, and in the production of artificial sweeteners like aspartame.
What is the chemical formula and molecular weight of L-Phenylalanine?
The chemical formula is C9H11NO2 and the molecular weight is 165.19 g/mol.
How should L-Phenylalanine be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of L-Phenylalanine does Molekula supply?
Molekula supplies L-Phenylalanine in reagent grade.
Can Molekula supply L-Phenylalanine in bulk?
Yes, Molekula can supply L-Phenylalanine in bulk quantities upon request.
What documentation comes with an order of L-Phenylalanine?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS).
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.