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Acid, base and phase-transfer catalysts

Hexamethonium hydroxide

Also known as 1,6-Hexanediaminium, N1,N1,N1,N6,N6,N6-hexamethyl-, hydroxide (1:2), Hexamethoniun, Hexamethonioum Dihydroxide

CAS 556-81-0Formula C12H32N2O2Molar mass 236.40 g/molEC 611-300-1
GHS signal word: Danger. Pictograms: Corrosive 6 suppliers listed
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Hexamethonium hydroxide chemical structure, C12H32N2O2, CAS 556-81-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
556-81-0
Formula
C12H32N2O2
Molar mass
236.40 g/mol
EC number
611-300-1
HS code
292390
Category
Acid, base and phase-transfer catalysts

What is Hexamethonium hydroxide?

Plain description, key identifiers and synonyms

Hexamethonium hydroxide is a chemical substance with the molecular formula C12H32N2O2 and a molar mass of 236.40 g/mol. Its CAS registry number is 556-81-0. The IUPAC name is trimethyl-[6-(trimethylazaniumyl)hexyl]azanium dihydroxide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
trimethyl-[6-(trimethylazaniumyl)hexyl]azanium dihydroxide
CAS number
556-81-0
EC number
611-300-1
Molecular formula
C12H32N2O2
UNII
RVL393940Z
MDL number
MFCD00677130, MFCD29073718
InChIKey
GYLUMIIRFKDCKI-UHFFFAOYSA-L
InChI
InChI=1S/C12H30N2.2H2O/c1-13(2,3)11-9-7-8-10-12-14(4,5)6;;/h7-12H2,1-6H3;2*1H2/q+2;;/p-2
SMILES (canonical and isomeric)
C[N+](C)(C)CCCCCC[N+](C)(C)C.[OH-].[OH-]

Synonyms

  • 1,6-Hexanediaminium, N1,N1,N1,N6,N6,N6-hexamethyl-, hydroxide (1:2)
  • Hexamethoniun
  • Hexamethonioum Dihydroxide
  • trimethyl-[6-(trimethylazaniumyl)hexyl]azanium, dihydroxide
  • Hexamethonium Dihydroxide (ca. 25% in Water)
  • Hexamethionium hydroxide
  • Hexamethonium Chloride Dihydrate 99.0+%
  • N,N,N,N inverted exclamation marka,N inverted exclamation marka,N inverted exclamation marka-Hexamethylhexamethylenediammonium dihydroxide
  • trimethyl-[6-(trimethylammonio)hexyl]ammonium, dihydroxide

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
236.40 g/molcalc.
Exact mass
236.2464 Dacalc.
LogP (octanol/water)
1.61calc.
Topological polar surface area
60 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
7calc.
Heavy atoms
16calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
3calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive

Hazard statements

  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
Precautionary statements (14)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P363Wash contaminated clothing before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Hexamethonium hydroxide suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 6 suppliers
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Where suppliers are based

6 suppliers in 2 countries

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Hexamethonium hydroxide price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Hexamethonium hydroxide is traded under.

HS 2923.90Indicative HS code

Quaternary ammonium salts and hydroxides whether or not chemically defined not elsewhere classified…

World exports in 2024
$1.07B
+14.4% vs 2023, imports $1.16B
2019 to 2024
Top exporters
  1. China36.7%
  2. United States14.2%
  3. Netherlands9.4%
Top importers
  1. South Korea10.7%
  2. Germany10.1%
  3. United States9.9%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Hexamethonium hydroxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Hexamethonium hydroxide, based on the data on this page

What is Hexamethonium hydroxide?

Hexamethonium hydroxide is a chemical substance with the molecular formula C12H32N2O2 and a molar mass of 236.40 g/mol. Its CAS registry number is 556-81-0. The IUPAC name is trimethyl-[6-(trimethylazaniumyl)hexyl]azanium dihydroxide.

What is the CAS number of Hexamethonium hydroxide?

The CAS registry number of Hexamethonium hydroxide is 556-81-0.

What is the molecular formula and weight of Hexamethonium hydroxide?

The molecular formula of Hexamethonium hydroxide is C12H32N2O2 and its molar mass is 236.40 g/mol.

Is Hexamethonium hydroxide hazardous?

Hexamethonium hydroxide carries the GHS signal word "Danger". Main hazards: causes severe skin burns and eye damage, causes serious eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Hexamethonium hydroxide?

Hexamethonium hydroxide is usually classified under HS code 292390 (Quaternary ammonium salts and hydroxides, lecithins and other phosphoaminolipids…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hexamethonium hydroxide?

CompoundList lists 6 suppliers of Hexamethonium hydroxide in China and India. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Hexamethonium hydroxide in India?

1 supplier in India list Hexamethonium hydroxide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Hexamethonium hydroxide?

Suppliers quote Hexamethonium hydroxide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Hexamethonium hydroxide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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