Cyanazin

Cyanamide flush Cyan amides Cyanate Cyanazine... 

Figure 5.8 shows a typieal plot of log (/ind) versus (log S") for Cyanazine erystallized form aqueous ethanol solution. 

Figure 5.8 Induction time-supersaturation plot for cyanazine in 70% wjw aqueous ethanol at 20°C Hurley etal., 1985)...

Induction period measurements can also be used to determine interfacial tensions. To validate the values inferred, however, it is necessary to compare the results with an independent source. Hurley etal. (1995) achieved this for Cyanazine using a dynamic contact angle analyser (Calm DCA312). Solid-liquid interfacial tensions estimated from contact angle measurements were in the range 5-12 mJ/m which showed closest agreement with values (4—20mJ/m ) obtained from the log-log plots of induction time versus supersaturation based on the assumption of — tg. 

Hurley, M.A., Jones, A.G. and Drummond, J.N., 1995. Crystallization kinetics of cyanazine precipitated from aqueous ethanol solutions. Chemical Engineering Research and Design, 73B, 52-57. 

CXY Chemicals hic.. See Nexen Chemicals (Canada), 148 Cyanamid Agricultural Products Division, See BASF Agricultural Products Group (Gemiany), 225 Cyananiide, 47 Cyanazine, 47... 

The triazines atraton (h/Jf 15-20), cyanazin (h/ff 30-35), terbutylazin (h/Jf 45-50) and anilazin (hRf 70-75) immediately appear as violet-blue chromatogram zones on a... 

Fig. 1 Chromatogram of triazines (A) after immersion in the dipping solution and (B) after additional heating and (Q reflectance scan of a chromatogram track with 170 ng each of atraton (1), cyanazin (2), terbutylazin (3) and anilazin (4) per chromatogram zone.

Depending on the duration of heating yellow-green to dark green chromatogram zones were produced on a weakly colored background. The detection limits of the triazine herbicides cyanazine (h/Jf 25-30), simazine (h/Jf 30-35), atrazine (h/Jf 40-45), terbutylazine (h/Jf 45-50) and anilazine (h/Jf 60-65) were 20 ng substance per chromatogram zone. 

Fig. 1 Reflectance scan of a chromatogram track with 100 ng each of 1 = cyanazine, 2 = simazine, 3 = atrazine, 4 = terbutylazine, 5 = anilazine per chromatogram zone.

Cyanazin (h/ f 5-10) appeared as gray, terbutylazin (h/ f 20-25) as violet and anilazin (h/Jj 35-40) as pale blue chromatogram zones (Fig. 1). The intensity of the spots increased during one hour but did not change thereafter. The detection limits for all three substances were 300 ng per chromatogram zone. These amounts could also readily be detected visually. 

Fig. 1 Thin-layer chromatogram of triazines (amount applied 4 gg each substance per chromatogram zonelflVacks 1 and 5 = mixture. Track 2 = cyanazin, Track 3 = terbutylazin. Track 4 = anilazin.

The substances methoprotryn (hRf 30-35), desmetryn (h/ f 40-45), ametryn (hRf 55-60), prometryn (h/Jf 65-70) and dipropretryn (h/ f 70-75) separated using mobile phase 1 and the components cyanazine (hRf 20-25), simazine (tiRf 30-35), atrazine (hRf 35-40), terbutylazine (h/Jj 45-50) and anilazine (h/ f 60-65) chromatographed with mobile phase 2 all yielded intense grey to brown-colored zones on a light brown background, that appear intense purple-red when viewed from the back of the plate (Wurster s red). 

Atrazine Cyanazine Desisopropylatrazine Hexazinon Metamitron Metribuzin Prometryn Propazine Sebutylazine Simazine Terbutryn Terbutylazine... 

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