Cyanazine |
![]() Last updated: 22/12/2020 |
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(Also known as: WL 19805; DW 3418) |
SUMMARY |
Cyanazine is a triazine herbicide approved for use in the EU and many other countries. It is moderately soluble in water and many organic solvents and it is relatively volatile. It is not persistent in soil systems but can often be persistent in water. It is moderately toxic to mammals and may have serious adverse health effects if ingested as it is a neurotoxin, a suspected endocrine disrupter and a development/reproduction toxin. Cyanazine is moderately toxic to most fauna and flora. |
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A pre-emergence herbicide used for general weed control includings grasses and broad-leaved weeds in a range of crops | |
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Nightshade; Bindweed; Chickweed; Clover; Crowsfoot; Docks; Plantain; Sorrel; Sowthistle; Stinging nettle; Deadnettle | |
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Vegetables including peas, chickpeas, beans, lentils, onions; Potatoes; Sweetcorn | |
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Current | |
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circa 1967 |
UK regulatory status |
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Not approved | ||
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Expired | ||
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No UK approval for use |
EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Sweden | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Also used in |
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Australia |
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Chemical structure |
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C₉H₁₃ClN₆ | |
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CCNC1=NC(=NC(=N1)Cl)NC(C)(C)C#N | |
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No data | |
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MZZBPDKVEFVLFF-UHFFFAOYSA-N | |
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InChI=1S/C9H13ClN6/c1-4-12-7-13-6(10)14-8(15-7)16-9(2,3)5-11/h4H2,1-3H3,(H2,12,13,14,15,16) | |
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Yes |
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Common Name | Relationship | Link |
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cyanazine | - | ![]() |
General status |
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Herbicide | |
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Triazine | |
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Synthetic | |
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Selective, systemic with contact and residual action. Inhibits photosynthesis (photosystem II). | |
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21725-46-2 | |
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244-544-9 | |
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230 | |
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100101 | |
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30773 | |
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240.69 | |
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2-{[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino}-2-methylpropanenitrile | |
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2-(4-chloro-6-ethylamino-1,3,5-triazin-2-ylamino)-2-methylpropiononitrile | |
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2-((4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl)amino)-2-methylpropanenitrile | |
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Potential groundwater contaminant; Chemical subject to PIC regulations | |
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C1 | |
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5 | |
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Not applicable | |
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Not applicable | |
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Kochia scoparia | |
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White crystals | |
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Formulations |
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Supplied in a wide range of formulations including suspension concentrates, wettable powders, granules & water-dispersible powders |
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171 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Moderate | ||||||||
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195000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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45000 | L3 L = Pesticide manuals and hard copy reference books / other sources Ethanol3 = Unverified data of known source |
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15000 | L3 L = Pesticide manuals and hard copy reference books / other sources Benzene3 = Unverified data of known source |
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15000 | L3 L = Pesticide manuals and hard copy reference books / other sources Hexane3 = Unverified data of known source |
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168 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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1.26 X 1002 | Calculated | - | |||||||
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2.1 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low | ||||||||
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1.29 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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12.9 | DW4 DW = Don Wauchope personal database for Pka data: Wauchope, R. D. and Edwards, J. Dissociation constants for pesticide active ingredients: a database and comparison with predicted values. MS in preparation 4 = Verified data |
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Very weak acid | |||||||||||
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0.000213 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low volatility | ||||||||
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6.60 X 10-06 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Non-volatile | ||||||||
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Degradation |
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16 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Non-persistent | |||||||
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16 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Non-persistent | ||||||||
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Other sources: DT₅₀ 12-25 days (R3) | ||||||||||
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4.0 | R4 R = Peer reviewed scientific publications 4 = Verified data |
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Various grasses, n=3 | ||||||||||
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Stable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Stable | |||||||
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Stable | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Stable | |||||||
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Stable pH 5 to pH 9, hydrolysed by strong acids and alkalis | ||||||||||
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84 | K4 K = Research datasets, e.g. Pandora, Demetra 4 = Verified data |
Moderately fast | ||||||||
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Soil adsorption and mobility |
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- | G3 G = Extension Toxicology network database EXTOXNET (click here ) 3 = Unverified data of known source |
Moderately mobile | |||||||
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190 | ||||||||||
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Other sources: 30-427 mL g⁻¹ (R3) | ||||||||||
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Fate indices |
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2.07 | Calculated | Transition state | ||||||||||||||||||||||||||
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6.25 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
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157 | P4 P = Other governments and regulators (Other literature Log BCF range 2.3-4.1 (R3))4 = Verified data |
Threshold for concern | |||||||
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Not available | - | |||||||||
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288 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
Moderate | ||||||||
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- | L2 L = Pesticide manuals and hard copy reference books / other sources Rat 2 year2 = Unverified data of unknown source |
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12 | - | |||||||||
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400 | L3 L = Pesticide manuals and hard copy reference books / other sources Phasianidae3 = Unverified data of known source |
Moderate | ||||||||
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10 | L2 L = Pesticide manuals and hard copy reference books / other sources Rasbora heteromorpha2 = Unverified data of unknown source |
Moderate | ||||||||
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0.08 | P3 P = Other governments and regulators Oncorhynchus mykiss 10 day3 = Unverified data of known source |
Moderate | ||||||||
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49 | J4 J = Pesticide Action Network database (click here ) Daphnia magna4 = Verified data |
Moderate | ||||||||
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0.051 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Lemna gibba3 = Unverified data of known source |
Moderate | ||||||||
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0.2 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Scenedesmus quadricauda4 = Verified data |
Moderate | ||||||||
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0.009 | J4 J = Pesticide Action Network database (click here ) Green algae4 = Verified data |
Moderate | ||||||||
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100 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
Moderate | |||||||
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600 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
Moderate | ||||||||
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General |
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High (class III) | - | - | ||||||||
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288 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Rat4 = Verified data |
Moderate | ||||||||
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2000 | L3 L = Pesticide manuals and hard copy reference books / other sources Rabbit3 = Unverified data of known source |
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2.46 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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Non-statutory WHO drinking water guideline 0.0006 mg l⁻¹ | B5 B = UK CRD and ACP evaluation documents / and other Defra (UK) documents (click here ) UK EA QS database 20185 = Verified data used for regulatory purposes |
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Health issues |
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USEPA - possible human carcinogen |
Handling issues |
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Prevent generation of spray mists | |||
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Health: H302 Environment: H400, H410 |
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Xn - Harmful: R22 N - Dangerous for the environment: R50, R53 |
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S2, S37, S60, S61 | |||
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II (Moderately hazardous) | |||
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cyanazine | ||
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cyanazine | ||
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Cyanazin | ||
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cyanazin | ||
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cianazina | ||
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cianazina | ||
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cyanazine | ||
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cyjanazyna | ||
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cyanazin | ||
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cianazin | ||
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cyanazin |
Record last updated: | 22/12/2020 |
Contact: | aeru@herts.ac.uk |
Please cite as: | Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal, 22(4), 1050-1064. DOI: 10.1080/10807039.2015.1133242 |