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H128

Sigma-Aldrich

(R)(−)-α-Methylhistamine dihydrochloride

≥98% (HPLC), Histamine receptor agonist, solid

Synonym(s):

(R)(−)-α-Methyl-1H-imidazole-4-ethanamine dihydrochloride

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5 MG
CN¥1,123.82
25 MG
CN¥5,184.97
100 MG
CN¥12,638.68

About This Item

Empirical Formula (Hill Notation):
C6H11N3 · 2HCl
CAS Number:
75614-89-0
Molecular Weight:
198.09
MDL number:
MFCD00083176
UNSPSC Code:
12352116
PubChem Substance ID:
24277778
NACRES:
NA.77

CN¥1,123.82

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Estimated to ship onDecember 16, 2025Details

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Product Name

(R)(−)-α-Methylhistamine dihydrochloride, solid, ≥98% (HPLC)

Quality Level

100

Assay

≥98% (HPLC)

form

solid

optical activity

[α]22/D −4°, c = 0.8 in H2O(lit.)

storage condition

desiccated

color

white to off-white

solubility

H2O: soluble

SMILES string

Cl.Cl.C[C@@H](N)Cc1c[nH]cn1

InChI

1S/C6H11N3.2ClH/c1-5(7)2-6-3-8-4-9-6;;/h3-5H,2,7H2,1H3,(H,8,9);2*1H/t5-;;/m1../s1

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This Item
H5914V90041153300
(R)(−)-α-Methylhistamine dihydrochloride solid, ≥98% (HPLC)

Sigma-Aldrich

H128

(R)(−)-α-Methylhistamine dihydrochloride

Nα-Methylhistamine dihydrochloride solid

Sigma-Aldrich

H5914

Nα-Methylhistamine dihydrochloride

Histamine dihydrochloride Vetec™, reagent grade, 98%

Sigma-Aldrich

V900411

Histamine dihydrochloride

Histamine dihydrochloride ≥99.0% (AT)

Sigma-Aldrich

53300

Histamine dihydrochloride

form

solid

form

solid

form

-

form

powder or crystals

assay

≥98% (HPLC)

assay

-

assay

98%

assay

≥99.0% (AT)

Quality Level

100

Quality Level

100

Quality Level

-

Quality Level

-

storage condition

desiccated

storage condition

-

storage condition

-

storage condition

-

solubility

H2O: soluble

solubility

H2O: >20 mg/mL

solubility

-

solubility

H2O: 0.1 g/mL, clear, colorless

color

white to off-white

color

white

color

-

color

-

Application

(R)(−)-α-Methylhistamine dihydrochloride has been used as an agonist for the histamine H3 cell lines.[1] It has also been used in the antagonist assay for the histamine H3 cell lines.[1]

Biochem/physiol Actions

(R)(−)-α-Methylhistamine dihydrochloride is a potent, selective H3 histamine receptor agonist which crosses the blood-brain barrier. It can inhibit histamine synthesis and release.

Pictograms

Exclamation mark
GHS07

Signal Word

Warning

Hazard Statements

H315,H319,H335

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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    Certificates of Analysis (COA)

    Lot/Batch Number
    0000382703
    0000382703
    0000358223
    0000355074
    0000333778

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    Magdalena Kotańska et al.
    Biochemical pharmacology, 168, 193-203 (2019-07-12)
    Histamine H3 receptors ligands act anorectic by blocking the H3 autoreceptors in the CNS, that results in increased synthesis and disinhibition of histamine release. Histamine further influencing H1 receptors participates in the leptin-dependent inhibition of food intake. It also affects
    Structure-activity relations of histamine analogs. XX. Absolute configuration and histamine-like activity of enantiomeric α-methyl histamines.
    Gerhard, et al.
    Archives of Pharmacal Research, 313, 709-709 (1980)
    J M Arrang et al.
    Nature, 327(6118), 117-123 (1987-05-14)
    New drugs selective for histamine H3-receptors can be used to establish that these receptors are involved in the feedback control of histamine synthesis and release, and to demonstrate their distribution in the brain and peripheral tissues. These drugs provide new
    Xu-Dong Wang et al.
    Nature communications, 10(1), 3201-3201 (2019-07-22)
    Pulmonary neuroendocrine (NE) cancer, including small cell lung cancer (SCLC), is a particularly aggressive malignancy. The lineage-specific transcription factors Achaete-scute homolog 1 (ASCL1), NEUROD1 and POU2F3 have been reported to identify the different subtypes of pulmonary NE cancers. Using a
    R Oishi et al.
    Journal of neurochemistry, 52(5), 1388-1392 (1989-05-01)
    To study the feedback control by histamine (HA) H3-receptors on the synthesis and release of HA at nerve endings in the brain, the effects of a potent and selective H3-agonist, (R)-alpha-methylhistamine, and an H3-antagonist, thioperamide, on the pargyline-induced accumulation of

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