Molekula
DL-Pyroglutamic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
DL-Pyroglutamic acid is a naturally occurring non-proteinogenic amino acid and key intermediate in biochemical pathways, widely used in pharmaceuticals, food additives, and research for its role in peptide synthesis and metabolic studies. This white crystalline powder has a CAS number of 149-87-1, molecular formula C5H7NO3, and a molecular weight of 129.11. It is stable at ambient storage conditions, with a signal word of "Warning" for safety handling. Molekula supplies DL-Pyroglutamic acid 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 to Off-white powder |
| Loss on Drying | ≤ 1.0% |
| Chloride (Cl-) | ≤ 0.2% |
| Residue on Ignition | ≤ 0.2% |
| Heavy Metals (Pb) | ≤ 10ppm |
| Assay (Titration) | 98.5 - 101.0% |
| Iron (Fe) | ≤ 10ppm |
| Arsenic trioxide (As2O3) | ≤ 1ppm |
| Ammonium (NH4+) | ≤ 0.2% |
| Sulphates (SO4)(2-) | ≤ 0.2% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90033021 |
| CAS Number | 149-87-1 |
| IUPAC Name | 5-oxopyrrolidine-2-carboxylic acid |
| EC Number | 205-748-3 |
| Molecular Formula | C5H7NO3 |
| Molecular Weight | 129.11 |
| Exact Mass | 129.0426 |
| SMILES | C1CC(=O)NC1C(=O)O |
| InChIKey | ODHCTXKNWHHXJC-UHFFFAOYSA-N |
| InChI | InChI=1S/C5H7NO3/c7-4-2-1-3(6-4)5(8)9/h3H,1-2H2,(H,6,7)(H,8,9) |
| PubChem CID | 499 |
| REACH Code | Y110 |
| HTS Code | 29339997 |
| Tariff Code | 2933790090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P333+313 IF skin irritation or a rash occurs: Get medical advice/attention
- P337+313 If eye irritation persists get medical advice/attention
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.
Synonyms
- 5-Oxo-D-prolin
- 5-Oxo-DL-proline
- 5-OXOPROLINE
- 5-Oxopyrrolidine-2-carboxylic acid
- DL-2-Pyrrolidinone-5-carboxylic acid
- DL-2-Pyrrolidone-5-carboxylic acid
- DL-Proline, 5-oxo-
- dl-pyrrolidonecarboxylic acid
- Pyr-OH
- Pyrrolidone carboxylic acid
Frequently asked questions
What is DL-Pyroglutamic acid commonly used for?
DL-Pyroglutamic acid is primarily used as an intermediate in the synthesis of pharmaceuticals, amino acids, and as a nutritional supplement in animal feed and human health products.
What is the chemical formula and molecular weight of DL-Pyroglutamic acid?
The chemical formula is **C₅H₇NO₃**, and the molecular weight is **129.11 g/mol**.
How should DL-Pyroglutamic acid be stored?
Store at **ambient temperature** in a cool, dry place, away from direct sunlight and incompatible substances.
What grades or purities of DL-Pyroglutamic acid does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/JP)** and **food-grade** DL-Pyroglutamic acid, depending on application requirements.
Can Molekula supply DL-Pyroglutamic acid in bulk quantities?
Yes, Molekula offers **bulk packaging options** (e.g., 25 kg drums, 50 kg bags) for industrial and commercial customers—please inquire for specific quantities.
What documentation is provided with an order of DL-Pyroglutamic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and **batch-specific documentation** for traceability and compliance.
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.