Metaxalone

Suppliers

Names

[ CAS No. ]:
1665-48-1

[ Name ]:
Metaxalone

[Synonym ]:
5-{[(3,5-dimethylphenyl)oxy]methyl}-1,3-oxazolidin-2-one
5-((3,5-Dimethylphenoxy)methyl)oxazolidin-2-one
Metaxalone
5-[(3,5-Dimethylphenoxy)methyl]-1,3-oxazolidin-2-one
5-[(3,5-Xylyloxy)methyl]-2-oxazolidinone
2-Oxazolidinone, 5-[(3,5-dimethylphenoxy)methyl]-
Metaxolone
MFCD00867700
5-(3,5-Dimethylphenoxymethyl)-2-oxazolidinone
Skelaxin
EINECS 216-777-6

Chemical & Physical Properties

[ Density]:
1.1±0.1 g/cm3

[ Boiling Point ]:
453.6±14.0 °C at 760 mmHg

[ Melting Point ]:
121-123ºC

[ Molecular Formula ]:
C12H15NO3

[ Molecular Weight ]:
221.252

[ Flash Point ]:
228.2±20.1 °C

[ Exact Mass ]:
221.105194

[ PSA ]:
47.56000

[ LogP ]:
2.42

[ Vapour Pressure ]:
0.0±1.1 mmHg at 25°C

[ Index of Refraction ]:
1.525

[ Storage condition ]:
-20°C Freezer

MSDS

Toxicological Information

CHEMICAL IDENTIFICATION

RTECS NUMBER :
RQ3850000
CHEMICAL NAME :
2-Oxazolidinone, 5-((3,5-xylyloxy)methyl)-
CAS REGISTRY NUMBER :
1665-48-1
LAST UPDATED :
199612
DATA ITEMS CITED :
4
MOLECULAR FORMULA :
C12-H15-N-O3
MOLECULAR WEIGHT :
221.28
WISWESSER LINE NOTATION :
T5MVOTJ D1OR C1 E1

HEALTH HAZARD DATA

ACUTE TOXICITY DATA

TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
775 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
27ZQAG "Psychotropic Drugs and Related Compounds," 2nd ed., Usdin, E., and D.H. Efron, Washington, DC, 1972 Volume(issue)/page/year: -,261,1972
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - rat
DOSE/DURATION :
515 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
ARZNAD Arzneimittel-Forschung. Drug Research. (Editio Cantor Verlag, Postfach 1255, W-7960 Aulendorf, Fed. Rep. Ger.) V.1- 1951- Volume(issue)/page/year: 17,242,1967
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Oral
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
1690 mg/kg
TOXIC EFFECTS :
Behavioral - muscle weakness Behavioral - rigidity (including catalepsy) Sense Organs and Special Senses (Eye) - mydriasis (pupillary dilation)
REFERENCE :
AIPTAK Archives Internationales de Pharmacodynamie et de Therapie. (Heymans Institute of Pharmacology, De Pintelaan 185, B-9000 Ghent, Belgium) V.4- 1898- Volume(issue)/page/year: 233,326,1978
TYPE OF TEST :
LD50 - Lethal dose, 50 percent kill
ROUTE OF EXPOSURE :
Intraperitoneal
SPECIES OBSERVED :
Rodent - mouse
DOSE/DURATION :
490 mg/kg
TOXIC EFFECTS :
Details of toxic effects not reported other than lethal dose value
REFERENCE :
27ZQAG "Psychotropic Drugs and Related Compounds," 2nd ed., Usdin, E., and D.H. Efron, Washington, DC, 1972 Volume(issue)/page/year: -,261,1972

Safety Information

[ Symbol ]:

GHS07

[ Signal Word ]:
Warning

[ Hazard Statements ]:
H302

[ Precautionary Statements ]:
P301 + P312 + P330

[ Hazard Codes ]:
F,T

[ Risk Phrases ]:
11-23/24/25-39/23/24/25

[ Safety Phrases ]:
7-16-36/37-45

[ RIDADR ]:
NONH for all modes of transport

[ RTECS ]:
RQ3850000

Synthetic Route

Precursor & DownStream

Precursor

  • 2,4-xylenol
  • Triglycidyl isocyanurate
  • 3,5-Dimethylphenol
  • 1-Amino-3-(3,5-dimethylphenoxy)-2-propanol
  • Methyl carbamate
  • 3-(3,5-Dimethylphenoxy)-1,2-Propanediol
  • Urea
  • 4-acetamidophenyl N-[3-(3,5-dimethylphenoxy)-2-hydroxypropyl]carbamate

DownStream

Articles

Commonly used muscle relaxant therapies for acute low back pain: a review of carisoprodol, cyclobenzaprine hydrochloride, and metaxalone.

Clin. Ther. 26(9) , 1355-67, (2004)

Low back pain is a leading reason for primary care visits. Many treatment options are available, but some lack scientific support.The aim of this review was to discuss the etiology of low back pain an...

Development of a Stability-Indicating RP-UPLC Method for Rapid Determination of Metaxalone and its Degradation Products in Solid Oral Dosage Form.

Sci. Pharm. 80(2) , 353-66, (2012)

A simple, sensitive and reproducible reversed phase ultra performance liquid chromatography (RP-UPLC) coupled with a photodiode array detector method was developed for the quantitative determination o...

Metaxalone (Skelaxin)-related death.

J. Anal. Toxicol. 28(6) , 537-41, (2004)

The case history and toxicological findings of a fatal multi-drug overdose involving metaxalone (Skelaxin) are presented. Gas-liquid chromatography with flame-ionization detection and gas chromatograp...


More Articles


Related Compounds

  • Metaxalone-d6
  • Metaxalone D3