Neostigmine Methyl Sulfate

Synonym(s):3-(N,N-Dimethylcarbamoyloxy)-N,N,N,-trimethylanilinium methyl sulfate

CAS NO.：51-60-5
Empirical Formula: C12H19N2O2.CH3O4S
Molecular Weight: 334.39
MDL number: MFCD00011796
EINECS: 200-109-5
SAFETY DATA SHEET (SDS)
Update Date: 2025-12-15 14:23:52

What is Neostigmine Methyl Sulfate?

Description

Neostigmine is a reversible inhibitor of acetylcholinesterase (AChE; K_d = 260 μM). In a rat model of knee joint inflammation, intrathecal administration of neostigmine (2-30 μg) increases endogenous acetylcholine levels and dose-dependently increases the latency of paw withdrawal in response to thermal and mechanical stimuli (ED₅₀s = 6.6 and 3.5 μg, respectively). Neostigmine (5 μg, i.p.) restores muscle action potentials in mice with a thymopoietin-induced neuromuscular block. Formulations containing neostigmine have been used in the treatment of myasthenia gravis and Ogilvie syndrome.

Chemical properties

Crystalline Solid

The Uses of Neostigmine Methyl Sulfate

Cholinergic; miotic; antidote (curare)

What are the applications of Application

Neostigmine Methyl Sulfate is a competitive inhibitor of acetylcholinesterase

Definition

ChEBI: Neostigmine methyl sulfate is an arylammonium sulfate salt. It has a role as an EC 3.1.1.8 (cholinesterase) inhibitor.

brand name

Prostigmine (ICN).

General Description

Neostigmine methylsulfate,(m-hydroxyphenyl)trimethylammonium methylsulfatedimethylcarbamate or the dimethylcarbamic ester of 3-hydroxyphenyltrimethylammoniummethylsulfate (Prostigminmethylsulfate), is a bitter, odorless, white, crystalline powder.It is very soluble in water and soluble in alcohol. Solutionsare stable and can be sterilized by boiling. The compound istoo hygroscopic for use in a solid form and thus is alwaysused as an injection. Aqueous solutions are neutral to litmus.

Clinical Use

The methylsulfate salt is used postoperatively as a urinarystimulant and in the diagnosis and treatment of myastheniagravis.

Purification Methods

Crystallise the sulfate from EtOH or Me2CO (m 143-144o). Its solubility in H2O is ~10%. [Beilstein 13 III 939.] (It is cholinergic and highly TOXIC.)

Properties of Neostigmine Methyl Sulfate

Melting point:	175-177 °C(lit.)
storage temp.	-20°C
solubility	H₂O: 1 g/mL
form	powder
color	white
Water Solubility	1g/10mL
Merck	14,6464
CAS DataBase Reference	51-60-5(CAS DataBase Reference)

Safety information for Neostigmine Methyl Sulfate

Signal word	Danger
Pictogram(s)	Skull and Crossbones Acute Toxicity GHS06 Health Hazard GHS08
GHS Hazard Statements	H300:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H334:Sensitisation, respiratory H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P284:Wear respiratory protection. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P342+P311:IF experiencing respiratory symptoms: call a POISON CENTER or doctor/physician.