N-Acetyl-L-cysteine
CAS Number: 616-91-1
Chemical Formula: C5H9NO3S
Synonyms:
N-Acetyl-L-cysteine
Acetylcysteine
L-Acetylcysteine
NAC
Appearance: White Crystalline Powder
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
N-Acetyl-L-cysteine is a modified amino acid derived from L-cysteine and acetic acid. It features strong antioxidant properties and serves as a precursor for glutathione synthesis. It is widely used in pharmaceuticals, dietary supplements, cosmetics, and healthcare products. In medical applications, it acts as a mucolytic agent to thin respiratory mucus and is used as an antidote for acetaminophen overdose. It also supports liver protection, immune function, and anti-aging processes. Its ability to chelate heavy metals makes it useful in detoxification formulations. In the food and beverage industry, it is used as a nutritional fortifier and flavor enhancer. In cosmetics, it provides moisturizing, brightening, and anti-irritation benefits.
Parameters
| Property | Value |
| Melting point | 106-110 °C (lit.) |
| Boiling point | 438.5±45.0 °C at 760 mmHg |
| density | 1.309 g/cm3 |
| refractive index | 1.513 |
| storage temp. | 2-8°C |
| solubility | H2O: 100 mg/mL, clear, colorless |
| form | Crystalline Powder |
| color | White to off-white |
| pH | 2.0-3.0 (10 g/L, H2O, 25℃) |
| Water Solubility | Soluble |
| pka | 9.78(at 25℃) |
| Sensitive | Hygroscopic |
| Stability | Stable under normal temperatures and pressures. Protect from light. |
| LogP | 0.23 |
| InChIKey | LQPYGBSZXQXBDH-YFKPBYRVSA-N |
| CAS DataBase Reference | 616-91-1(CAS DataBase Reference) |
Safety Information
| Item | Value |
| Hazard Codes | Xi |
| Risk Statements | 36/37/38 |
| Safety Statements | 26-36 |
| WGK Germany | 3 |
| RTECS | AC2625000 |
| TSCA | TSCA listed |
| HS Code | 29309090 |
| Toxicity | LD50 orally in rat: >5000 mg/kg |
Product Application of N-Acetyl-L-cysteine CAS#616-91-1
N-Acetyl-L-cysteine is widely used in respiratory care to relieve mucus buildup in bronchitis, asthma, and COPD. It is a proven antidote for acetaminophen poisoning and supports liver health. As a powerful antioxidant, it fights oxidative stress, boosts immunity, and promotes skin repair. It is used in oral care, skincare, and hair care formulations. In sports nutrition, it supports endurance and recovery. It also functions as a chelator for detoxification and is used in clinical nutrition and infant formulas.
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