Ancymidol (Ref: EL 531) |
![]() Last updated: 29/12/2020 |
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(Also known as: ancymidole) |
SUMMARY |
Ancymidol is a plant growth regulator that is not approved for use in the EU. It is volatile and highly soluble in water. It is not persistent in soil systems and generally not persistent in water. It is moderately mobile and so there is a risk of leaching to groundwater under some conditions. It has a moderate mammalian toxicity but is not expected to bioaccumulate. Ancymidol is moderately toxic to fish, aquatic invertebrates, aquatic plants and honey bees. However it is less toxic to algae and birds. |
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A plant growth inhibitor used to produce more compact horticultural, non-food plants | |
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Growth - internodal elongation to improve plant shape | |
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Ornamentals particularly container grown herbaceous plants and woody shrubs | |
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Current | |
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1973, USA |
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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Also used in |
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USA |
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Chemical structure |
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A chiral molecule | |
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C₁₅H₁₆N₂O₂ | |
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COC1=CC=C(C=C1)C(C2CC2)(C3=CN=CN=C3)O | |
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No data | |
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HUTDUHSNJYTCAR-UHFFFAOYSA-N | |
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InChI=1S/C15H16N2O2/c1-19-14-6-4-12(5-7-14)15(18,11-2-3-11)13-8-16-10-17-9-13/h4-11,18H,2-3H2,1H3 | |
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Yes |
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Common Name | Relationship | Link |
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ancymidol | Unstated isomer | ![]() |
General status |
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Plant growth regulator | |
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Pyrimidinyl carbinol | |
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Synthetic | |
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Absorbed by leaves and roots, acts via the inhibition of gibberellin biosynthesis: Gibberellin antagonist | |
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12771-68-5 | |
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235-814-7 | |
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8017 | |
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108601 | |
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25572 | |
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256.30 | |
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rac-(R)-cyclopropyl(4-methoxyphenyl)(pyrimidin-5-yl)methanol | |
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(RS)-α-cyclopropyl-4-methoxy-α-(pyrimidin-5-yl)benzyl alcohol | |
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α-cyclopropyl-α-(4-methoxyphenyl)-5-pyrimidinemethanol | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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Not applicable | |
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White crystalline solid |
Formulations |
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Usually supplied as a soluble concentrate |
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650 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
High | ||||||||
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250000 | L3 L = Pesticide manuals and hard copy reference books / other sources Methanol3 = Unverified data of known source |
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250000 | L3 L = Pesticide manuals and hard copy reference books / other sources Acetone3 = Unverified data of known source |
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37000 | L3 L = Pesticide manuals and hard copy reference books / other sources Hexane3 = Unverified data of known source |
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110.5 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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Decomposes before boiling | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 4 = Verified data |
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Not expected to self ignite; Not highly flammable | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 4 = Verified data |
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8.13 X 1001 | Calculated | - | |||||||
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1.91 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low | ||||||||
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0.42 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 4 = Verified data |
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0.13 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Low volatility | ||||||||
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1.58 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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15 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Non-persistent | |||||||
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120 | Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source |
Persistent | ||||||||
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15 | H4 H = The US ARS pesticide properties database (click here ) 4 = Verified data |
Non-persistent | ||||||||
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Some studies quote DT₅₀ as high as 120 days (US3) | ||||||||||
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30 | W4 W = French database provided by ARVALIS-Institut du Végétal 4 = Verified data |
Moderately persistent | |||||||
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Hydrolysis is not pH sensitive in range 5-9, 25 °C | ||||||||||
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Soil adsorption and mobility |
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- | H3 H = The US ARS pesticide properties database (click here ) 3 = Unverified data of known source |
Moderately mobile | |||||||
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Best available data | ||||||||||
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Fate indices |
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2.45 | Calculated | Transition state | ||||||||||||||||||||||||||
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9.19 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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Low | Calculated | - | ||||||||||||||||||||||||||
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Moderately mobile | Calculated | - |
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8.38 | Q2 Q = Miscellaneous internet resources Estimated2 = Unverified data of unknown source |
Low potential | |||||||
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Not available | - | |||||||||
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1721 | 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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- | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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8000 | - | |||||||||
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5192 | F2 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Colinus virginianus2 = Unverified data of unknown source |
Low | ||||||||
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> 100 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Oncorhynchus mykiss4 = Verified data |
Low | ||||||||
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> 100 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Daphnia magna4 = Verified data |
Low | ||||||||
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0.193 | 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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26.9 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) Pseudokirchneriella subcapitata3 = Unverified data of known source |
Low | ||||||||
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> 100 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents (US EPA Databases Related to Pesticide Risk Assessment ) 4 = Verified data |
Low | |||||||
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General |
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High (class III) | - | - | ||||||||
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1721 | 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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200 | L3 L = Pesticide manuals and hard copy reference books / other sources Rabbit3 = Unverified data of known source |
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5.6 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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Due to usage pattern the risk to bystanders and consumers is negligible | |||||||||
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Health issues |
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Moderately toxic May cause respiratory problems Physical dependence may develop |
Handling issues |
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Incompatible with strong oxidizing agents and acids | |||
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Not classified: Obsolete | |||
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Xn - Harmful: R20/21/22 | |||
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S24/25, S36/37/39 | |||
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III (Slightly hazardous) | |||
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ancymidol | ||
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ancymidole | ||
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Ancymidol | ||
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ancymidol | ||
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ancimidol | ||
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ancimidol | ||
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ancymidol | ||
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Record last updated: | 29/12/2020 |
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 |