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Dayang Chem (Hangzhou) Co., Ltd.
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Product Name: 2-[2-(Methylamino)ethyl]pyridine
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Henan Tianfu Chemical Co., Ltd.
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5638-76-6

5638-76-6 structure

5638-76-6 structure

Name: Betahistine
Chemical Name: betahistine
CAS Number: 5638-76-6
Molecular Formula: C₈H₁₂N₂
Molecular Weight: 136.194
Catalog: API Circulatory system medication Peripheral vasodilator
Create Date: 2018-04-14 08:00:00
Modify Date: 2024-01-02 18:11:30
Betahistine is an orally active histamine H1 receptor agonist and a H3 receptor antagonist[1]. Betahistine is used for the study of rheumatoid arthritis (RA)[3].

Name	betahistine
Synonyms	2-(b-Methylaminoethyl)pyridine N-methyl-2-pyridin-2-ylethanamine Pyridine, 2-[2- (methylamino)ethyl]- MFCD00006362 N-Methyl-2-(2-pyridinyl)ethanamine EINECS 227-086-4 Suzutolon 2-Pyridineethanamine, N-methyl- 2-(2-Methylaminoethyl)pyridine N-methyl-2-(pyridin-2-yl)ethanamine N-Methyl-2-pyridineethanamine Betahistine

Description	Betahistine is an orally active histamine H1 receptor agonist and a H3 receptor antagonist[1]. Betahistine is used for the study of rheumatoid arthritis (RA)[3].
Related Catalog	Research Areas >> Cancer Signaling Pathways >> Immunology/Inflammation >> Histamine Receptor Research Areas >> Inflammation/Immunology Signaling Pathways >> GPCR/G Protein >> Histamine Receptor
Target	H1 Receptor H3 receptor
In Vitro	Betahistine (0-10 μM) inhibits [125I]iodoproxyfan binding to membranes of CHO (rH3(445)R) and CHO (hH3(445)R) cells with IC50 values of 1.9 μM and 3.3 μM, respectively. Lead to Ki values of 1.4 μM and 2.5 μM, respectively[2]. Betahistine (0-10 μM) has a regulating function on cAMP formation in CHO (rH3(445)R), CHO (rH3(413)R), and CHO (hH3(445)R) cells. At low concentrations, betahistine behaves an apparent inverse agonist, and progressively enhances cAMP formation with EC50 values of 0.1 nM, 0.05 nM and 0.3 nM, respectively. In contrast, at concentrations higher than 10 nM, betahistine inhibits cAMP formation with an EC50 value of 0.1 μM in CHO (rH3(445)R) and full agonist activity[2].
In Vivo	Betahistine (intraperitoneal or oral administration; 0.1-30 mg/kg; single dose) with acute administration has increased tele-methylhistamine (t-MeHA) levels with an ED50 of 0.4 mg/kg, indicating the inverse agonism. Besides, after acute oral administration, it increases t-MeHA levels with an ED50 of 2 mg/kg in male Swissmice[2]. Betahistine (oral adminstration; 1 and 5 mg/kg; daily for 3 weeks) attenuates the severity of arthritis and reduces the levels of pro-inflammatory cytokines in the paw tissues of CIA mice[3]. Animal Model: Collagen-induced arthritis (CIA) DBA/1 male mouse model[3] Dosage: 1 mg/kg; 5mg/kg Administration: Oral adminstration; day 21 to day 42 after a 21-day CIA induction Result: Ameliorated mouse CIA by decreasing joint destruction.
References	[1]. Poyurovsky M, et al. The effect of betahistine, a histamine H1 receptor agonist/H3 antagonist, on olanzapine-induced weight gain in first-episode schizophrenia patients. Int Clin Psychopharmacol. 2005 Mar;20(2):101-3. [2]. Gbahou F, et al. Effects of betahistine at histamine H3 receptors: mixed inverse agonism/agonism in vitro and partial inverse agonism in vivo.J Pharmacol Exp Ther. 2010 Sep 1;334(3):945-54. [3]. Tang KT, et al. Betahistine attenuates murine collagen-induced arthritis by suppressing both inflammatory and Th17 cell responses.Int Immunopharmacol. 2016 Oct;39:236-245.

Density	1.0±0.1 g/cm3
Boiling Point	210.9±15.0 °C at 760 mmHg
Molecular Formula	C₈H₁₂N₂
Molecular Weight	136.194
Flash Point	96.7±0.0 °C
Exact Mass	136.100052
PSA	24.92000
LogP	0.10
Vapour Pressure	0.2±0.4 mmHg at 25°C
Index of Refraction	1.510
Storage condition	-20℃

CHEMICAL IDENTIFICATION

RTECS NUMBER :: UT5552000

CHEMICAL NAME :: Pyridine, 2-(2-(methylamino)ethyl)-

CAS REGISTRY NUMBER :: 5638-76-6

BEILSTEIN REFERENCE NO. :: 0112294

LAST UPDATED :: 199701

DATA ITEMS CITED :: 6

MOLECULAR FORMULA :: C8-H12-N2

MOLECULAR WEIGHT :: 136.22

WISWESSER LINE NOTATION :: T6NJ B2M1

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 :: 6110 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: PBFMAV Problemi na Farmatsiyata. Problems in Pharmacy. (Durzhavno Izdatel'stvo Meditsina i Fizkultura, Pl. Slaveikov II, Sofia, Bulgaria) V.1- 1973- Volume(issue)/page/year: 13,63,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 980 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: PBFMAV Problemi na Farmatsiyata. Problems in Pharmacy. (Durzhavno Izdatel'stvo Meditsina i Fizkultura, Pl. Slaveikov II, Sofia, Bulgaria) V.1- 1973- Volume(issue)/page/year: 13,63,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 2920 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: PBFMAV Problemi na Farmatsiyata. Problems in Pharmacy. (Durzhavno Izdatel'stvo Meditsina i Fizkultura, Pl. Slaveikov II, Sofia, Bulgaria) V.1- 1973- Volume(issue)/page/year: 13,63,1985

TYPE OF TEST :: LD50 - Lethal dose, 50 percent kill

ROUTE OF EXPOSURE :: Intraperitoneal

SPECIES OBSERVED :: Rodent - mouse

DOSE/DURATION :: 320 mg/kg

TOXIC EFFECTS :: Details of toxic effects not reported other than lethal dose value

REFERENCE :: PBFMAV Problemi na Farmatsiyata. Problems in Pharmacy. (Durzhavno Izdatel'stvo Meditsina i Fizkultura, Pl. Slaveikov II, Sofia, Bulgaria) V.1- 1973- Volume(issue)/page/year: 13,63,1985 ** OTHER MULTIPLE DOSE TOXICITY DATA **

TYPE OF TEST :: TDLo - Lowest published toxic dose

ROUTE OF EXPOSURE :: Oral

SPECIES OBSERVED :: Rodent - rat

DOSE/DURATION :: 94500 mg/kg/90D-C

TOXIC EFFECTS :: Behavioral - muscle weakness Nutritional and Gross Metabolic - weight loss or decreased weight gain Related to Chronic Data - death

REFERENCE :: OYYAA2 Oyo Yakuri. Pharmacometrics. (Oyo Yakuri Kenkyukai, CPO Box 180, Sendai 980-91, Japan) V.1- 1967- Volume(issue)/page/year: 2,344,1968

Symbol	GHS07
Signal Word	Warning
Hazard Statements	H315-H319-H335
Precautionary Statements	P261-P305 + P351 + P338
Personal Protective Equipment	Eyeshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US);type ABEK (EN14387) respirator filter
Hazard Codes	Xi: Irritant;C: Corrosive;
Risk Phrases	R36/37/38
Safety Phrases	S26-S37/39
RIDADR	UN2735
WGK Germany	2
RTECS	UT5552000
HS Code	2933399090

Precursor 9
67-56-1 2706-56-1 557-04-0 6304-27-4
143185-43-7 100-69-6 593-51-1 103-74-2
6998-30-7
DownStream 2
88780-61-4 939979-42-7

HS Code	2933399090
Summary	2933399090. other compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%