827-16-7

Basic information

• Product Name: trimethyl isocyanurate
• Synonyms: trimethyl isocyanurate;1,3,5-Trimethyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione;1,3,5-Trimethylhexahydro-1,3,5-triazine-2,4,6-trione;1,3,5-Trimethylisocyanuric acid;1,3,5-Triazine-2,4,6(1H,3H,5H)-trione,1,3,5-trimethyl-
• CAS NO: 827-16-7
• Molecular Formula: C₆H₉N₃O₃
• Molecular Weight: 171.15
• Mol File: 827-16-7.mol
• Article Data: 6

Chemical Properties

• Melting Point: 176.5°C
• Boiling Point: 301.12°C (rough estimate)
• Flash Point: 122.4°C
• Appearance: /
• Density: 1.3994 (rough estimate)
• Vapor Pressure: 0.00555mmHg at 25°C
• Refractive Index: 1.5800 (estimate)
• Storage Temp.: Sealed in dry,Room Temperature
• PKA: -2.13±0.20(Predicted)
• CAS DataBase Reference: trimethyl isocyanurate(CAS DataBase Reference)
• NIST Chemistry Reference: trimethyl isocyanurate(827-16-7)
• EPA Substance Registry System: trimethyl isocyanurate(827-16-7)

Safety Data

• Hazardous Substances Data: 827-16-7(Hazardous Substances Data)

Usage

Uses

The crystal structure of Trimethyl-1,3,5-triazinane-2,4,6-trione has been reported previously to have low accurancy and without H-atom position, this compound in its molecular complex with 1,3,5-trinitrobenzene has been used in the construction of suprmolecular networks stabilized by hydrogen bonds.

Synthesis Reference(s)

Journal of the American Chemical Society, 78, p. 4358, 1956 DOI: 10.1021/ja01598a043

General Description

Monoclinic prisms (from water or alcohol).

Reactivity Profile

Isocyanates and thioisocyanates, such as trimethyl isocyanurate, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Polyurethanes are formed by the condensation reaction of diisocyanates with, for example, ethyl glycol.

Fire Hazard

Flash point data for trimethyl isocyanurate are not available. trimethyl isocyanurate is probably combustible.

InChI:InChI=1/C6H9N3O3/c1-7-4(10)8(2)6(12)9(3)5(7)11/h1-3H3

Upstream product

• 108-74-7 1,3,5-trimethyl-1,3,5-triazacyclohexane 
• 816-00-2 1,3,5-trimethyl-biuret 
• 598-50-5 N-Methylurea 
• 63352-06-7 3-methylaminopyrazine-2-carbonitrile 
• 624-83-9 methyl isocyanate 
• 68563-74-6 1-n-butyl-3,4-dimethyl-2,5-dihydro-1H-phosphole 
• 67-56-1 methanol 
• 598-55-0 methyl carbamate 
• 684-93-5 1-methyl-1-nitrosourea 
• 67-66-3 chloroform 
• 16208-36-9 2-benz-(E)-ylidenehydrazinecarboxylic acid ethyl ester 

Downstream Products

• 51495-95-5 6-hydroxy-1,3,5-trimethyl-6-phenyl-[1,3,5]triazinane-2,4-dione 
• 74-89-5 methylamine 
• 7647-01-0 hydrogenchloride 
• 7719-12-2 phosphorus trichloride 
• 67-64-1 acetone 
• 75-50-3 trimethylamine 
• 463-79-6 carbonic-acid 

Relevant articles and documents

1,4,2-Diazaphospholidine-3,5-diones and related compounds: A lecture on unpredictability in catalysis

1,4,2-diazaphospholidine-3,5-diones and related compounds and unpredictability in catalysis was studied. The five-membered ring species 4 6, which are all readily accessible by the McCormack reaction, optionally with subsequent hydrogenation, were selected for this study. The use of saturated species of type 4 (1-organyl-phospholanes) as catalysts led to a complete reverse in the selectivity of the reaction, in favor of the formation of the isocyanate trimers. Owing to the high activity of the corresponding P-oxides in carbodiimidization reactions, it can be assumed that the findings can be attributed to partial air oxidation of the trivalent phosphorus species applied. The symmetrical species 6, in total contrast to the other two members of the series, do not exhibit any catalytic activity with respect to isocyanates and instead react cleanly with two equivalents of isocyanate to effect the extrusion of 1,3-diene.

A new simple synthesis of 3,5-disubstituted 1-amino-1,3,5-triazine- 2,4,6-triones from ethoxycarbonylhydrazones and isocyanates

The 3,5-disubstituted 1-amino-1,3,5,-triazine-2,4,6-triones were synthesized in good yields from aromatic aldehyde or ketone ethoxycarbonylhydrazones by treatment with aryl or methyl isocyanates in boiling triethylamine followed by hydrolysis with hydrochloric acid solution.

Studies of Methyl Isocyanate Chemistry in the Bhopal Incident

Following the methyl isocyanate leak from Tank 610 at the Bhopal plant, the residual material from the tank was analyzed for its contents.Approximately 70percent of the residue was comprised of three cyclic materials: 1,3,5-trimethyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione or methyl isocyanate trimer (5), 1,3-dimethyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione or dimethyl isocyanurate (6), and dihydro-1,3,5-trimethyl-1,3,5-triazine-2,4-(1H,3H)-dione or dihydrotrimethyltriazinedione (7).Minor quantities of methyl-substituted ureas, biurets, and amine hydrochlorides were also found.The composition of the residue was replicated very closely by the products obtained when a mixture of methyl isocyanate (84.4percent), chloroform (12.0percent), and water (3.6percent) was heated at 225 deg C under pressure in a stainless steel reactor.Experimental results are consistent with the view that under these conditions methyl isocyanate reacts initially with water to form 1,3-dimethylurea (1) and 1,3,5-trimethylbiuret (2).At temperatures between 100 deg C and 225 deg C these products decompose to reactive intermediates which further react exothermically to form the aforementioned cyclic materials, trimethylurea, and mono-, di-, and trimethylamine hydrochlorides.The decomposition of 1 and 2 is facilitated by the presence of chloroform and metals.Other experiments involving 13C-enriched chloroform have given support to the proposed mechanisms for formation of 6 and 7.