Triazine


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Triazine

 

any of several six-membered heterocyclic compounds containing three nitrogen atoms in the ring. The substituted triazines, which are the best known, exist in all three possible systems: vicinal 1,2,3-triazines (I), asymmetric 1,2,4-triazines (II), and symmetric 1,3,5-triazines (III).

Triazines are strong bases, which yield salts with acids. Substituted 1,3,5-triazines, which are used as herbicides (for example, atrazine, desmetryn, and prometryn) and dyes and in the production of plastics and rubbers, have the greatest practical importance. They are obtained, for example, from cyanuric chloride (1) or by the trimerization of the nitriles of carboxylic acids (2):

References in periodicals archive ?
A vibrational band at 680-689 cm-1 present in FT-IR spectra of all dyes confirmed the presence of the triazine ring.
Polymers using an X-CSM and peroxide cure do not have as good thermal compression set performance as the triazine type cure.
Triazine exposure has been implicated in a likely relationship to increased risk of breast cancer, although a causal relationship remains unclear (Manolis, 1997; Stryer, 1995).
Also the introduction of triazine molecule in to the dye improves the exhaustion and fixation value (Table 4).
1]) corresponding to methylene ether bridges that form between the triazine rings during polymerization.
New low-volatility, FDA-cleared Tinuvin 1577 FF triazine light stabilizer can extend the use of PET and PC in housing and architectural applications.
Bismaleimide triazine (BT) resin remains the dominant material for PBGA substrates and Mitsubishi Gas Chemical retains a monopoly position, even though substitute materials from Hitachi Chemical, Mitsui Chemicals (BN300) and others have been introduced.
Following application of triazine pesticides to the plots, field samples (topsoil and subsoil) collected at 1-3-monthly intervals over 2 years were analysed in the laboratory for atrazine mineralisation activity and numbers of atrazine degraders.
On March 10, the European Commission decided not to include atrazine, a triazine herbicide with residual and foliar activity and the most widely used compound in this group of herbicides, within Annex I of Directive 91/414/EEC governing the marketing of plant health products in the EU.
He maintains that the phasing out of the broad-acting triazine family of herbicides and their replacement by more weed-specific chemicals is almost certain to lead to greater resistance to chemical herbicides.
This report concerns the fitness cost of triazine resistance.