 |
|
 |
 |
 |
 |
 |
Review of Atrazine - Chemistry Assessment
Section 3, November 1997
1. ACTIVE CONSTITUENT
1.1 Chemical identity
|
Common name: |
atrazine |
|
Chemical name: |
IUPAC: 2 chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine Chem. Abs: 2-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazin-4,6-diamine |
|
CAS no: |
1912-24-9 |
|
Code no: |
Ciba-Geigy G 30027 |
|
Structural formula: |
|
|
Empirical formula: |
C8H14ClN5 |
|
Molecular weight: |
215.7 |
1.2 Chemical & physical properties - pure active constituent
| Appearance: | white powder, colourless crystalline solid | |
| Odour: | slight, non-specific, odourless | |
| Melting point: | 175-177°C | |
| Octanol/water | Kow: 398 | |
| partition coeff: | log P: 2.5 | log Kow: 2.6 |
| Density: | 1.19 g/cm3 at 20oC | |
| 1.187 g/cm3 at 20oC | ||
| 1.23 g/cm3 at 22oC | ||
| Vapour pressure: | 5.7 x 10-8 mmHg at 10oC | |
| 3.0 x 10-7 mm Hg (4 x 10-5 Pa) at 20oC | ||
| 3.0 x 10-7 mmHg at 20oC | ||
| 1.4 x 10-6 mm Hg (1.9 x 10-4 Pa) at 30oC | ||
| 1.4 x 10-6 mmHg at 30oC | ||
| 6.0 x 10-6 mm Hg (8.0 x 10-4 Pa) at 40oC | ||
| 2.3 X 10-5 mmHg at 50oC | ||
| pKa: | 1.6 (very weak base) pK = 1.64 at 20oC | |
| Solubility: | 30 ppm in water (20oC) 30 ppm at 20oC | |
| 33 mg/L at 22oC | ||
| chloroform | 52000 ppm | |
| diethyl ether | 12000 ppm | |
| ethyl acetate | 24000 ppm | |
| n-octanol | 8700 ppm | |
| methanol | 15000 ppm | |
| acetone | 31000 ppm | |
| toluene | 4000 ppm | |
| n-hexane | 110000 ppm | |
| dichloromethane | 28000 ppm | |
| Vapour Pressure: | 3.85 x 10-5 Pa at 25oC | |
1.3 Chemistry aspects
The chemistry aspects (manufacturing process, quality control procedures, batch analysis results and analytical methods) of the atrazine TGACs have been evaluated and continue to meet current standards.
2. FORMULATION OF END USE PRODUCTS
3. DECLARATION OF COMPOSITION
Atrazine TGACs contain a minimum of 92-95% atrazine and a minimum of 98% active triazines (includes the symmetrical triazines simazine and propazine). Impurities include dichlorotriazines, tris(alkylamino)triazines and hydroxy-triazines.
See Attachments 2-1 to 2-6 for Declarations of Composition and Batch Analyses for currently-approved sources of TGAC atrazine.
ATTACHMENTS
The following attachments contain commercial-in-confidence material and have been removed.
1-1 to 1-30 End use product details
2-1 to 2-6 Declarations of composition and batch analyses