Clinical data
AHFS/ Micromedex Detailed Consumer Information
ATC code D01AE07 (WHO)
Pharmacokinetic data
Excretion urine
CAS Number 886-74-8
PubChem (CID) 2724
ChemSpider 2623
KEGG D00770
ECHA InfoCard 100.002.902
Chemical and physical data
Formula C10H12ClNO4
Molar mass 245.660 g/mol
3D model (Jmol) Interactive image
Melting point 86 to 92 °C (187 to 198 °F)

Chlorphenesin carbamate (Maolate, Musil) is a centrally acting muscle relaxant used to treat muscle pain and spasms.[1][2] Chlorphenesin is no longer used for this purpose in most developed nations due to the availability of much safer spasmolytics such as benzodiazepines.

Other central effects include sedation, anxiolysis, and dizziness. It also has antifungal and some antibacterial properties and is thus classified as an antifungal for topical use by the WHO.[3]


The major adverse effect from this preservative on skin is allergic contact sensitivity.[4][5] Systemic intoxication from transdermal use has not been observed, although the FDA discourages its use as an ingredient in nipple cream for nursing mothers.[6]


  1. Okuyama, S; Aihara, H (1987). "Antinociceptive effect of chlorphenesin carbamate in adjuvant arthritic rats". Research communications in chemical pathology and pharmacology. 55 (2): 147–60. PMID 3823606.
  2. Kurachi, M; Aihara, H (1984). "Effect of a muscle relaxant, chlorphenesin carbamate, on the spinal neurons of rats". Japanese journal of pharmacology. 36 (1): 7–13. doi:10.1254/jjp.36.7. PMID 6503049.
  3. ATC code D01AE07
  4. Brown R (1981). "Chlorphenesin sensitivity". Contact Dermatitis. 7 (3): 162. doi:10.1111/j.1600-0536.1981.tb04601.x. PMID 6456118.
  5. Burns DA (1986). "Allergic contact sensitivity to chlorphenesin". Contact Dermatitis. 14 (33): 246. doi:10.1111/j.1600-0536.1986.tb01234.x. PMID 2941223.
  6. "FDA Warns Consumers Against Using Mommy's Bliss Nipple Cream Product can be harmful to nursing infants".
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