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| | DEXBROMPHENIRAMINE MALEATE Basic information |
| | DEXBROMPHENIRAMINE MALEATE Chemical Properties |
| Melting point | 132-134℃ | | storage temp. | -20°C Freezer | | solubility | Methanol (Slightly), Water (Slightly) | | form | Solid | | color | White to Off-White |
| Hazard Codes | T | | Risk Statements | 25 | | Safety Statements | 22-36/37/39-45 | | RIDADR | UN 2811 6.1/PG 3 | | WGK Germany | 3 | | RTECS | US4026200 | | HS Code | 2933399090 | | Toxicity | guinea pig,LD50,oral,259mg/kg (259mg/kg),SENSE ORGANS AND SPECIAL SENSES: MYDRIASIS (PUPILLARY DILATION): EYEBEHAVIORAL: TREMORBEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD,Chemotherapia. Vol. 3, Pg. 120, 1961. |
| | DEXBROMPHENIRAMINE MALEATE Usage And Synthesis |
| Originator | Disomer,White,US,1959 | | Uses | The S-enantimer of Brompheniramine maleate (B686355) as antihistaminic. | | Definition | ChEBI: The maleic acid salt of the (pharmacologically active) (S)-(+)-enantiomer of brompheniramine. A histamine H1 receptor antagonist, it is used for the symptomatic relief of allergic conditions, including rhinitis and co
junctivitis. | | Manufacturing Process | The following is taken from US Patent 3,061,517. Sixteen grams of racemic 3-
(2-pyridyl)-3-p-bromophenyl-N,N,-dimethylpropylamine and 9.7 grams of dphenylsuccinic acid are dissolved in 150 ml of absolute alcohol and kept at
room temperature until crystallization is effected. The crystals are filtered,washed with absolute ethyl alcohol, and recrystallized from the same solvent
using 5 ml there of per gram of solid. Three subsequent crystallizations from
80% alcohol give d-3-(2-pyridyl)-3-p-bromophenyl-N,N-dimethylpropylamined-phenylsuccinate; MP 152-154°C; [α]D25 91 (concentration, 1% in
dimethylformamide).
The free base, d-3-(2-pyridyl)-3-p-bromophenyl-N,N-dimethylpropylamine, is
obtained from this salt with diethyl ether and aqueous potassium carbonate;
[α]D25 +42.7 (concentration, 1% in dimethylformamide). The free base is then
reacted with maleic acid. | | Brand name | Disomer (Schering). | | Therapeutic Function | Antihistaminic | | General Description | Like the chlorinederivative, the antihistaminic activity of brompheniramineexists predominantly in the dextro isomer, dexbrompheniraminemaleate (D-isomer), and is of comparable potency. | | Biological Activity | Antihistamine; H1 histamine receptor antagonist. |
| | DEXBROMPHENIRAMINE MALEATE Preparation Products And Raw materials |
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