Properties
- Melting point:
- 75-76°
- alpha
- D25 +67.3° (c = 0.6 in chloroform)
- Boiling point:
- 475.43°C (rough estimate)
- Density
- 1.0751 (rough estimate)
- refractive index
- 1.5614 (estimate)
- Flash point:
- 2℃
- storage temp.
- 2-8°C
- pka
- pKa 6.3(50% aq EtOH) (Uncertain)
Safety Information
- Symbol(GHS)
GHS02,GHS07
- Signal word
- Danger
- Hazard statements
- H225-H302+H312+H332-H319
- Precautionary statements
- P210-P261-P302+P352+P312-P304+P340+P312-P337+P313-P403+P235
- Hazard Codes
- F,Xn,T
- Risk Statements
- 11-20/21/22-36-52/53-25
- Safety Statements
- 16-26-36/37-61-45-36/37/39
- RIDADR
- 3249
- WGK Germany
- 2
- HazardClass
- 6.1(b)
- PackingGroup
- III
- Toxicity
- An opioid analgesic similar in structure to methadone. It is a much less potent analgesic than morphine
and is devoid of antipyretic or anti-inflammatory effects. Its side
effects are qualitatively similar to codeine. The clinical indications for propoxyphene are much the same as for aspirin. It is used when
the degree of analgesia required is less than that produced by morphine. Recent clinical trials suggest that propoxyphene is no more
effective in controlling mild pain than is aspirin. Because they act
by different mechanisms, aspirin and propoxyphene have often
been given in combination. Recently, there has been a trend away
from use of propoxyphene because its weak analgesic properties
do not compensate for other problems with its use. Interestingly,
the analgesic activity of propoxyphene resides largely in the
dextrorotatory isomer, whereas the antitussive effect is produced
primarily by the levorotatory isomer. The use of propoxyphene
was banned in the United States in November 2010. The oral LD50
in rats is 84 mg/kg.
Use
Propoxyphene (dextropropoxyphene; Darvon) is structurally related to methadone but is much less potent as an analgesic. Compared with codeine, propoxyphene is approximately half as potent and is indicated for the treatment of mild pain. It is not antipyretic or antiinflammatory like aspirin and is less useful than aspirin in most cases of mild pain.