Diphenhydramine
- Product Name
- Diphenhydramine
- CAS No.
- 58-73-1
- Chemical Name
- Diphenhydramine
- Synonyms
- Benadryl;Benzhydryl;Dimedrol;DIPHENHYDRAMINE BASE;Benzhydril;Etanautine;Benzhydramine;Difenidramina;DiMenhydraMine;2-(Diphenylmethoxy)-N,N-dimethylethylamine
- CBNumber
- CB6196202
- Molecular Formula
- C17H21NO
- Formula Weight
- 255.35
- MOL File
- 58-73-1.mol
Diphenhydramine Property
- Melting point:
- 167-172°C
- Boiling point:
- bp2.0 150-165°
- Density
- 0.9889 (rough estimate)
- refractive index
- 1.5450 to 1.5490
- storage temp.
- Keep in dark place,Inert atmosphere,Room temperature
- solubility
- Chloroform (Slightly), Methanol (Slightly)
- form
- Oil
- pka
- pKa 9.1 (Uncertain)
- color
- Oil
- Merck
- 14,3309
- BCS Class
- 1
- CAS DataBase Reference
- 58-73-1(CAS DataBase Reference)
- NIST Chemistry Reference
- Ethylamine, 2-diphenylmethoxy-n,n-dimethyl-(58-73-1)
- EPA Substance Registry System
- Ethanamine, 2-(diphenylmethoxy)-N,N-dimethyl- (58-73-1)
Safety
- RTECS
- KR6825000
- HS Code
- 2922.19.7000
- Hazardous Substances Data
- 58-73-1(Hazardous Substances Data)
- Toxicity
- LD50 oral in rat: 390mg/kg
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H302Harmful if swallowed
H315Causes skin irritation
H319Causes serious eye irritation
- Precautionary statements
-
P264Wash hands thoroughly after handling.
P264Wash skin thouroughly after handling.
P270Do not eat, drink or smoke when using this product.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P321Specific treatment (see … on this label).
P330Rinse mouth.
P332+P313IF SKIN irritation occurs: Get medical advice/attention.
P362Take off contaminated clothing and wash before reuse.
P501Dispose of contents/container to..…
N-Bromosuccinimide Price
- Product number
- D4744
- Product name
- Diphenhydramine
- Purity
- >98.0%(GC)(T)
- Packaging
- 5g
- Price
- $46
- Updated
- 2024/03/01
- Product number
- D4744
- Product name
- Diphenhydramine
- Purity
- >98.0%(GC)(T)
- Packaging
- 25g
- Price
- $132
- Updated
- 2024/03/01
- Product number
- D487128
- Product name
- Diphenhydramine
- Packaging
- 10g
- Price
- $435
- Updated
- 2021/12/16
- Product number
- 470664
- Product name
- Diphenhydramine
- Packaging
- 1mg
- Price
- $453
- Updated
- 2021/12/16
- Product number
- 470663
- Product name
- Diphenhydramine
- Packaging
- 1mg
- Price
- $453
- Updated
- 2021/12/16
Diphenhydramine Chemical Properties,Usage,Production
Description
Diphenhydramine is one of the main representatives of antihistamine drugs that block H1 receptors. Besides antihistamine activity, diphenhydramine exhibits a local anesthetic effect, relaxes smooth muscle, and has sedative and soporific action.
Originator
Benadryl,Parke Davis,US,1946
Uses
Diphenhydramine also reduces muscle rigidity and general stiffness, and has a relatively minor effect on tremors.
Uses
Diphenhydramine is used for symptoms of allergies, for treating hives, hay fever, serum sickness, and other allergic illnesses, and also as a sedative and soporific drug as an independent as well as in combination with other drugs. Synonyms of this drug are dimedrol, benadryl, allergina, valdren, and many others.
Uses
Antihistaminic.
Definition
ChEBI: Diphenhydramine is an ether that is the benzhydryl ether of 2-(dimethylamino)ethanol. It is a H1-receptor antagonist used as a antipruritic and antitussive drug. It has a role as a H1-receptor antagonist, an antiemetic, a sedative, an anti-allergic agent, a muscarinic antagonist, an antiparkinson drug, an antipruritic drug, a local anaesthetic, an antidyskinesia agent, an antitussive and a oneirogen. It is an ether and a tertiary amino compound.
Manufacturing Process
As described in US Patent 2,421,714: (a) benzhydryl
omide is first prepared
as follows: 840 parts by weight of diphenylmethane is heated to 130°C with
stirring. In the presence of a 200 watt electric light 6 inches from the flask,
880 parts of
omine is added slowly. Liberation of H
occurs and addition
requires 1 hour and 45 minutes. The temperature is maintained at 130°C for
an additional 30 minutes. A fine stream of air is blown in to remove H
and
2 while the reaction mixture cools. Benzene (180 parts) is added and the
solution used immediately in (b) below.
If pure benzhydryl
omide is desired the above reaction mixture is dissolved
in ether, washed with water, sodium carbonate solution and finally with water.
The ether is removed, benzene added and distilled off and the benzhydryl
omide distilled in vacuo. Yield 85%.
(b) 490 parts β-dimethylaminoethanol and 530 parts of anhydrous sodium
carbonate are heated to 110°C with stirring. The addition of the benzenebenzhydryl
omide mixture is then begun. The temperature is raised to 120°-
125°C. As reaction takes place carbon dioxide is evolved, the addition requires1? hours. The mixture is kept at 125°C for 5 hours additional time. After
cooling, 3,000 parts of water is added and the mixture stirred until the
inorganic salts are dissolved. The mixture is transferred to a large separatory
funnel and 1,500 parts of ether added. The ether solution is washed several
times with water and then the ether layer extracted with 1 to 4 hydrochloric
acid. The acid solution is treated with 30 parts of Darco and 30 parts Filter-Cel
and filtered.
The free base is liberated from the acid solution with 20% sodium hydroxide
solution and taken up in ether. The ether layer is washed with water, saturated
with NaCl and then shaken with solid potassium hydroxide. The ether is
removed by distillation, 200 parts of benzene added and distilled off. The
residue is distilled in vacuo and the fraction 150°-165°C/2 mm is collected
and amounts to 433 parts. The hydrochloride salt is prepared by dissolving
the free base in anhydrous ether and slowly adding an alcoholic solution of
hydrogen chloride. The solid is recrystallized from absolute alcohol-ether
mixture or isopropanol-ether mixture and has a MP of 161-162°C.
Therapeutic Function
Antihistaminic
Trade name
Benadryl (Parke-Davis)
Contact allergens
This antihistaminic drug with sedative properties is mainly sold over the counter. It can be used both topically (treatment of pruritis) and orally for its antiallergic, antiemetic, sedative, and anticough properties. Allergic or photoallergic contact dermatitis and fixeddrug eruption seem to be rare.
Safety Profile
Deadly human poison by an unspecified route. Poison by ingestion, intravenous, intraperitoneal, and subcutaneous routes. Experimental reproductive effects. Human systemic effects by ingestion: somnolence, alteration of operant conditioning, changes in psychophysiological tests. Human mutation data reported. When heated to decomposition it emits toxic fumes of NO,. See also ETHERS.
Synthesis
Diphenhydramine, 2-diphenylmethoxy-N,N-dimethylamine (10.2.5), is synthesized by the esterification of 2-dimethylaminoethanol with benzhydrylbromide [35¨C37].
Environmental Fate
Diphenhydramine is fairly stable in the environment
although it does undergo photodegradation. Conjugates of
diphenhydramine such as diphenhydramine-N-glucuronide
may be converted back to the parent compound, diphenhydramine,
through enzymatic cleavage during sewage treatment
process. Diphenhydramine is removed poorly through wastewater
treatment processes and is found in significant concentrations
in aquatic organisms downstream from such plants.
Diphenhydramine has significant risk for bioaccumulation,
particularly in water downstream from wastewater and sewage
treatment facilities.
Solubility in water
One gram of diphenhydramine is soluble in 1 mL of water, 2 mL of ethanol, 2 mL of chloroform, or 50 mL of acetone; the compound is very slightly soluble in benzene or ether.
Toxicity evaluation
The toxicity of antihistamines is related to their anticholinergic (antimuscarinic), antihistamine, and serotonergic activation. The action of acetylcholine at the muscarinic receptors is blocked, resulting in signs and symptoms of anticholinergic poisoning. Diphenhydramine may produce direct toxicity unrelated to its anticholinergic properties including inhibition of cardiac fast sodium channels and at higher concentrations, the drug may inhibit potassium channels, which can result in QT prolongation. Diphenhydramine also blocks the reuptake of serotonin and has been reported to cause serotonin syndrome in some individuals during overdose. The action of diphenhydramine at H-1 receptors causes sedation.
Diphenhydramine Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Diphenhydramine manufacturers
- Product
- Diphenhydramine 58-73-1
- Price
- US $56.00/KG
- Min. Order
- 1KG
- Purity
- 98%
- Supply Ability
- 1-1000kg
- Release date
- 2021-06-07
- Product
- Diphenhydramine 58-73-1
- Price
- US $50.00/kg
- Min. Order
- 1kg
- Purity
- 0.99
- Supply Ability
- 10000
- Release date
- 2023-10-09
- Product
- Diphenhydramine 58-73-1
- Price
- US $70.00/kg
- Min. Order
- 1kg
- Purity
- 99% HPLC
- Supply Ability
- 20 tons
- Release date
- 2022-10-13