Molekula
N-Acetyl-L-cysteine
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
N-Acetyl-L-cysteine (NAC) is a synthetic derivative of the amino acid L-cysteine, widely used as a mucolytic agent to break down mucus and as an antioxidant in pharmaceuticals, dietary supplements, and industrial applications. It is also employed in detoxification, heavy metal chelation, and as a precursor in glutathione synthesis. This white to off-white crystalline powder has a CAS number of 616-91-1, requires no special storage conditions (stable at ambient temperatures), and carries no signal word under standard handling guidelines. Molekula supplies N-Acetyl-L-cysteine 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
Specifications available on request — see Documents below or contact our sales team.
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White, crystalline powder |
| Odour | Slight acetic odor |
| Melting Point | 109.5 °C |
| Solubility (other solvents) | Soluble in water, alcohol, hot isopropyl alcohol, methyl acetate, and ethyl acetate |
| Vapour Pressure | 1.1 × 10⁻⁵ mmHg at 25 °C (Estimated) |
| pKa | pKa = 9.52 (at 25 °C) |
| log P (octanol/water) | -0.66 |
Source: PubChem CID 12035 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 90030426 |
| CAS Number | 616-91-1 |
| IUPAC Name | (2R)-2-acetamido-3-sulfanylpropanoic acid |
| EC Number | 210-498-3 |
| Exact Mass | 163.0303 |
| SMILES | CC(=O)N[C@@H](CS)C(=O)O |
| InChIKey | PWKSKIMOESPYIA-BYPYZUCNSA-N |
| InChI | InChI=1S/C5H9NO3S/c1-3(7)6-4(2-10)5(8)9/h4,10H,2H2,1H3,(H,6,7)(H,8,9)/t4-/m0/s1 |
| PubChem CID | 12035 |
| REACH Code | Y110 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
Documents
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
- Acetadote
- Acetilcisteina
- acetylcysteine
- Acetylcysteinum
- Brunac
- Fluimucetin
- L-Acetylcysteine
- mercapturic acid
- N-Acetylcysteine
- Respaire
Frequently asked questions
What is N-Acetyl-L-cysteine primarily used for?
N-Acetyl-L-cysteine (NAC) is commonly used as a mucolytic agent to thin mucus in respiratory conditions, as an antioxidant, and in the synthesis of glutathione for detoxification and cellular protection.
What is the chemical formula and molecular weight of N-Acetyl-L-cysteine?
The chemical formula is **C₅H₉NO₃S**, and the molecular weight is **163.19 g/mol**.
How should N-Acetyl-L-cysteine be stored?
Store at ambient temperature in a dry, well-ventilated area, away from moisture and strong oxidizing agents.
What grades of N-Acetyl-L-cysteine does Molekula supply?
Molekula supplies **pharmaceutical-grade (USP/EP/JP)** and **food-grade (FG)** N-Acetyl-L-cysteine, depending on application requirements.
Can Molekula supply N-Acetyl-L-cysteine in bulk quantities?
Yes, we offer bulk quantities of N-Acetyl-L-cysteine, with flexible packaging options (e.g., drums, bags, or custom solutions) based on customer needs.
What documentation is provided with an order of N-Acetyl-L-cysteine?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS)**, and, for pharmaceutical/food-grade, a **Certificate of Conformity (CoC)** to relevant standards (USP/EP/FG).
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.