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Hardeners and crosslinkers

Metepa

Also known as Methyl aphoxide, MAPO, Tris(2-methyl-1-aziridinyl)phosphine oxide

CAS 57-39-6Formula C9H18N3OPMolar mass 215.24 g/molEC 200-326-5
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 7 suppliers listed
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Metepa chemical structure, C9H18N3OP, CAS 57-39-6
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
57-39-6
Formula
C9H18N3OP
Molar mass
215.24 g/mol
EC number
200-326-5
HS code
293399
Category
Hardeners and crosslinkers

What is Metepa?

Plain description, key identifiers and synonyms

Tris(2-methyl-1-aziridinyl)phosphine oxide is a phosphoramide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-bis(2-methylaziridin-1-yl)phosphoryl-2-methylaziridine
CAS number
57-39-6 CAS number cross-checked
EC number
200-326-5
Molecular formula
C9H18N3OP
UNII
9PB481H025
MDL number
MFCD00046984
InChIKey
AVUYXHYHTTVPRX-UHFFFAOYSA-N
InChI
InChI=1S/C9H18N3OP/c1-7-4-10(7)14(13,11-5-8(11)2)12-6-9(12)3/h7-9H,4-6H2,1-3H3
SMILES (canonical and isomeric)
CC1CN1P(=O)(N2CC2C)N3CC3C

Synonyms

  • Methyl aphoxide
  • MAPO
  • Tris(2-methyl-1-aziridinyl)phosphine oxide
  • Tris(1-methylethylene)phosphoric triamide
  • Aziridine, 1,1',1''-phosphinylidynetris(2-methyl-
  • Aziridine, 1,1',1''-phosphinylidynetris[2-methyl-
  • Methaphoxide
  • Metapoxide
  • Metapa
  • Tris(methylaziridinyl)phosphine oxide
  • Tris(2-methylaziridin-1-yl)phosphine oxide
  • EMT 50,003
  • ENT 50,003
  • Trimethylaziridinylphosphine oxide
  • Tris(1,2-propylene)phosphoramide
  • Tris(2-methylaziridinyl)phosphine oxide
  • N,N',N''-Tris(1-methylethylene)phosphoramide
  • Phosphine oxide, tris(2-methyl-1-aziridinyl)-
  • Phosphine oxide, tris(1-(2-methyl)aziridinyl)-
  • 1,1',1''-Phosphinylidynetris(2-methyl)aziridine
  • 1-bis(2-methylaziridin-1-yl)phosphoryl-2-methyl-aziridine
  • 1-bis(2-methylaziridin-1-yl)phosphoryl-2-methylaziridine
  • 1,1',1''-phosphoryltris(2-methylaziridine)
  • Aziridine, 1,1,1-phosphinylidynetris[2-methyl-
  • Tris(1-[2-methyl]aziridinyl)phosphine oxide
Show all 35 synonyms
  • Tris(1-(2-methyl)aziridinyl)phosphine oxide
  • Phosphine oxide, tris[1-(2-methyl)aziridinyl]-
  • Phosphine oxide, tris[1-(2-methylaziridinyl)]-
  • Tris[1-(2-methyl)aziridinyl]phosphine oxide
  • Avuyxhyhttvprx-uhfffaoysa-
  • N,N''-Tris(1-methylethylene)phosphoramide
  • Tris-1-(2-methylaziridinyl) phosphine oxide
  • 1,1''-Phosphinylidynetris(2-methyl)aziridine
  • Aziridine,1',1''-phosphinylidynetris[2-methyl-
  • 1,1,1-Phosphinylidynetris[2-methyl-aziridine

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
215.24 g/molcalc.
Exact mass
215.1187 Dacalc.
LogP (octanol/water)
1.21calc.
Topological polar surface area
26.1 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
3calc.
Heavy atoms
14calc.
Rings
3calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
6calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=P(N1CC1)(N1CC1)N1CC1

O=P(N1CC1)(N1CC1)N1CC1

3 rings, 11 atoms, the Triethylenephosphoramide ring system.

4 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
  • H310Fatal in contact with skin.
Precautionary statements (12)
  • P262Do not get in eyes, on skin, or on clothing.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P316Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P361 + P364Take off immediately all contaminated clothing. And wash it 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

Metepa suppliers

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

All 7 suppliers
7 of 7 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

7 suppliers in 3 countries

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Metepa price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Metepa, based on the data on this page

What is Metepa?

Tris(2-methyl-1-aziridinyl)phosphine oxide is a phosphoramide.

What is the CAS number of Metepa?

The CAS registry number of Metepa is 57-39-6.

What is the molecular formula and weight of Metepa?

The molecular formula of Metepa is C9H18N3OP and its molar mass is 215.24 g/mol.

What is Metepa used for?

Known uses and roles of Metepa include crosslinkers and hardeners in paints and coatings and hardeners and curing agents in adhesives and sealants.

Is Metepa hazardous?

Metepa carries the GHS signal word "Danger". Main hazards: toxic if swallowed, fatal in contact with skin. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Metepa?

Metepa is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Metepa?

CompoundList lists 7 suppliers of Metepa in China, India and Germany. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Metepa in India?

2 suppliers in India list Metepa on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Metepa?

Suppliers quote Metepa 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 Metepa

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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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