Ancymidol (Ref: EL 531)
Last updated: 15/01/2023
(Also known as: ancymidole)
Ancymidol is a plant growth regulator. 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.
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate
Ecotoxicity
Human health
A plant growth inhibitor used to produce more compact horticultural, non-food plants
Growth - internodal elongation to improve plant shape
Ornamentals particularly container grown herbaceous plants and woody shrubs
-
Current
1973, USA
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
-
Expired
-
Yes
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
 
 
 
 
 
 
 
 
 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
 
 
 
 
 
 
 
 
 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
 
 
 
 
 
 
 
 
 
A chiral molecule. Ancymidol is racemic.
C₁₅H₁₆N₂O₂
COC1=CC=C(C=C1)C(C2CC2)(C3=CN=CN=C3)O
No data
HUTDUHSNJYTCAR-UHFFFAOYSA-N
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
Yes
Cambridge Crystallographic Data Centre diagrams
Common Name
Relationship
Link
ancymidol
Unstated isomer
Plant Growth Regulator
Pyrimidinyl carbinol PGR
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-
Synthetic
Absorbed by leaves and roots, acts via the inhibition of gibberellin biosynthesis: Gibberellin antagonist
12771-68-5
235-814-7
8017
108601
25572
No data found
256.30
rac-(R)-cyclopropyl(4-methoxyphenyl)(pyrimidin-5-yl)methanol
(RS)-α-cyclopropyl-4-methoxy-α-(pyrimidin-5-yl)benzyl alcohol
α-cyclopropyl-α-(4-methoxyphenyl)-5-pyrimidinemethanol
-
-
Not applicable
Not applicable
Not applicable
Not applicable
-
White crystalline solid
Fine Chemicals Sepro Corp Elanco
Usually supplied as a soluble concentrate
650
High
250000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Methanol
-
250000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Acetone
-
37000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Hexane
-
110.5
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
Decomposes before boiling
-
-
-
-
-
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-
8.13 X 1001
Calculated
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1.91
Low
-
-
-
-
-
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0.42
-
-
-
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-
0.13
Low volatility
1.58 X 10-06
Non-volatile
-
-
-
-
-
-
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15
Non-persistent
120
Q3 Q = Miscellaneous internet resources 3 = Unverified data of known source
Persistent
15
Non-persistent
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-
-
-
-
-
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-
Some studies quote DT₅₀ as high as 120 days (US3)
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-
-
-
-
-
-
-
-
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30
W4 W = French database provided by ARVALIS-Institut du Végétal 4 = Verified data
Moderately persistent
Hydrolysis is not pH sensitive in range 5-9, 25 °C
-
-
-
-
-
-
Soil adsorption and mobility
-
Moderately mobile
83
Best available data
-
-
-
-
-
-
-
2.45
Calculated
Transition state
9.19 X 10-02
Calculated
-
-
Low
Calculated
-
Moderately mobile
Calculated
-
8.38
Q2 Q = Miscellaneous internet resources 2 = Unverified data of unknown source
Estimated
Low potential
Not available
-
None
Terrestrial ecotoxicology
1721
Rat
Moderate
-
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
8000
-
-
-
-
5192
Colinus virginianus
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
> 100
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
> 100
Oncorhynchus mykiss
Low
-
-
-
> 100
Daphnia magna
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
0.193
Lemna gibba
Moderate
26.9
Pseudokirchneriella subcapitata
Low
-
-
-
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
1721
Rat
Moderate
200
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rabbit
-
5.6
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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Due to usage pattern the risk to bystanders and consumers is negligible
-
EU MRL pesticide database 
-
-
-
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
No data found
A0 A = Chromosome aberration (EFSA database) 0 = No data
; B0 B = DNA damage/repair (EFSA database) 0 = No data
; C0 C = Gene mutation (EFSA database) 0 = No data
; D0 D = Genome mutation (EFSA database) 0 = No data
; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data
?Possibly, status not identified
Reproduction / development effects
Acetyl cholinesterase inhibitor
Neurotoxicant
XNo, known not to cause a problem
XNo, known not to cause a problem
No data found
Respiratory tract irritant
Skin irritant
Skin sensitiser
No data found
XNo, known not to cause a problem
No data found
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
Moderately toxic May cause respiratory problems Physical dependence may develop
Incompatible with strong oxidizing agents and acids Not expected to autoignite; Not highly flammable
Not classified: Obsolete
III (Slightly hazardous)
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ancymidol
ancymidole
Ancymidol
ancymidol
ancimidol
ancimidol
-
ancymidol
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-
-
Record last updated:
15/01/2023
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