| Fentin hydroxide |
![]() Last updated: 27/10/2025 |
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(Also known as: organotin; triphenyltin hydroxide) |
| SUMMARY |
| Fentin hydroxide is an obsolete organotin fungicide. It has a low aqueous solubility and low volatility. Evidence suggests it is not persistent in soil systems but may be more so in aquatic systems. Based on its physico-chemical properties it is not expected to leach to groundwater. Ecotoxicological data is limited but acute oral ecotoxicity tends to be high to moderate. It is moderately toxic to mammals via the oral route. |
| Hazard alerts |
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. These hazard alerts do not take account of usage patterns or exposure, thus do not represent risk.
| Environmental fate | Ecotoxicity | Human health |
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A non-systemic fungicide used to control a variety of infections including blight on potatoes, leaf spot on sugar beet and alternaria blight on carrots | |
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Early and late blight; Septoria leaf spot; Rusts; Scab | |
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Potatoes; Celery and celeriac; Onions; Sugarbeet; Peanuts; Wheat; Coffee; Pecans | |
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| GB regulatory status |
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Not approved | ||
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Expired | ||
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No UK approval for use as a plant protection agent |
| EC Regulation 1107/2009 (repealing 91/414) |
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Not approved | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Expired | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Not applicable | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Yes | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Additional information |
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| Chemical structure |
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None | |
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C₁₈H₁₆OSn | |
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C1=CC=C(C=C1)[Sn](C2=CC=CC=C2)C3=CC=CC=C3.O | |
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No data | |
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BFWMWWXRWVJXSE-UHFFFAOYSA-M | |
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InChI=1S/3C6H5.H2O.Sn/c3*1-2-4-6-5-3-1;;/h3*1-5H;1H2;/q;;;;+1/p-1/rC18H16OSn/c19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18/h1-15,19H | |
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Yes |
| General status |
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Fungicide | ||||||||||||||
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Organometal fungicide; Organotin fungicide | ||||||||||||||
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Synthetic | ||||||||||||||
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Curative and protective action. Inhibitor of mitochondrial ATP synthase. | ||||||||||||||
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76-87-9 | ||||||||||||||
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200-990-6 | ||||||||||||||
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490 | ||||||||||||||
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083601 | ||||||||||||||
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6327657 | ||||||||||||||
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050-004-00-1 | ||||||||||||||
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367.0 | ||||||||||||||
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triphenylstannanol | ||||||||||||||
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triphenyltin hydroxide | ||||||||||||||
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triphenylstannylium hydroxide | ||||||||||||||
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Yes [ R01 Rule 1: Pesticide active ingredients that meet the criteria of classes Ia or Ib of the WHO Recommended Classification of Pesticides by Hazard (or those with a CLP classification of H330) ; R02 Rule 2: Pesticide active ingredients that meet the criteria of carcinogenicity Categories 1A and 1B of the Globally Harmonized System on Classification and Labelling of Chemicals (GHS) (those with a CLP classification of H350) ; R04 Rule 4: Pesticide active ingredients that meet the criteria of reproductive toxicity Categories 1A and 1B of the Globally Harmonized System on Classification and Labelling of Chemicals (GHS) (those with a CLP classification of H360) ; R09 Rule 9: Pesticide active ingredients that have demonstrated a high aquatic toxicity (where acute ecotoxicity for fish, invertebrates or algae =< 0.1 mg l⁻¹) ; R11 Rule 11: Pesticide active ingredients that are environmentally persistent (where sediment phase only DT₅₀ => 90 days or water phase only DT₅₀ => 90 days or DT₅₀ (field) => 60 days (note lab values are used when field values are not available)) ; R12 Rule 12: Pesticide active ingredients that are bioaccumulative (where bio-concentration factor (BCF) > 2000 l kg⁻¹ (if BCF is not available, where Log P >=5)) ] |
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Severe marine pollutant | ||||||||||||||
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Not applicable | ||||||||||||||
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Not applicable | ||||||||||||||
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Not applicable | ||||||||||||||
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30 | ||||||||||||||
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- | ||||||||||||||
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Colourless crystals | ||||||||||||||
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| Commercial |
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1960, introduced; 2003, withdrawn UK | |||
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Usually formulated as a wettable powder or suspension concentrate | |||
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Fentin hydroxide is commercially produced by hydrolysing triphenyltin chloride in an aqueous medium. The process begins with the reaction of triphenyltin chloride with water or a dilute base such as sodium hydroxide, which facilitates the substitution of the chloride ion with a hydroxyl group to form triphenyltin hydroxide. This reaction is typically carried out under controlled temperature and pH conditions to ensure complete conversion and minimize side reactions. | |||
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1 | B5 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) 5 = Verified data used for regulatory purposes |
Low | ||||||||
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50000 | B4 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) Acetone4 = Verified data |
- | ||||||||
| 10000 | B4 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) Ethanol4 = Verified data |
- | |||||||||
| 74000 | B4 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) 1,2-Dichloroethane4 = Verified data |
- | |||||||||
| 171000 | B4 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) Diethyl ether4 = Verified data |
- | |||||||||
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123 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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- | - | - | ||||||||
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- | - | - | ||||||||
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174 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
- | ||||||||
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2.69 X 1003 | Calculated | - | |||||||
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3.43 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
High | ||||||||
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Soluble | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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Regulatory data - observed in metabolism and farm animal feeding studies | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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1.54 | L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source |
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0.047 | B5 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) 5 = Verified data used for regulatory purposes |
Low volatility | ||||||||
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4.30 X 10-02 | V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID ) 3 = Unverified data of known source |
Non-volatile | ||||||||
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| Degradation |
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26 | K4 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 4 = Verified data |
Non-persistent | |||||||
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26 | K4 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 4 = Verified data |
Non-persistent | ||||||||
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75 | X3 X = WINPST database (click here ) 3 = Unverified data of known source |
Moderately persistent | ||||||||
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18 | K3 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 3 = Unverified data of known source |
Slow | |||||||
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30 | K3 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 3 = Unverified data of known source |
Moderately persistent | |||||||
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30 | K3 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 3 = Unverified data of known source |
Moderately fast | ||||||||
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7 | K3 K = Research datasets (e.g. Pandora, Demetra; these datasets no longer available). Norman Ecotoxicology database. (click here ) 3 = Unverified data of known source |
Moderately fast | ||||||||
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As this parameter is not normally measured directly, a surrogate measure is used: ‘Photochemical oxidative DT₅₀’. Where data is available, this can be found in the Fate Indices section below. | ||||||||||
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| Soil adsorption and mobility |
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- | W3 W = French database provided by ARVALIS-Institut du Végétal. Dataset no longer available. 3 = Unverified data of known source |
Slightly mobile | |||||||
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3104 | ||||||||||
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| Fate indices |
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0.95 | Calculated | Low leachability | ||||||||||||||||||||||||||
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1.91 X 10-02 | Calculated | - | |||||||||||||||||||||||||
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High | Calculated | - | ||||||||||||||||||||||||||
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Slightly mobile | Calculated | - | ||||||||||||||||||||||||||
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4300 | P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data |
Threshold for concern | |||||||||||||||||||||||||
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Not available | - | |||||||||||||||||||||||||||
| Known metabolites |
None
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| Terrestrial ecotoxicology |
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108 | B5 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) Rat5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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377.6 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Anas platyrhynchos4 = Verified data |
Moderate | ||||||||
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32 | Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source |
Moderate | ||||||||
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114.8 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Apis mellifera3 = Unverified data of known source |
Low | |||||||
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| Aquatic ecotoxicology |
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0.05 | L3 L = Pesticide manuals and hard copy reference books / other sources Cyprinidae spp.3 = Unverified data of known source |
High | ||||||||
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< 0.00021 | P3 P = Other non-EU, UK or US Governments and Regulators Cyprinodon variegatus3 = Unverified data of known source |
High | ||||||||
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0.021 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Danio rerio EC₅₀ Embryo3 = Unverified data of known source |
High | ||||||||
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0.0165 | L3 L = Pesticide manuals and hard copy reference books / other sources Daphnia magna3 = Unverified data of known source |
High | ||||||||
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0.01 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Ceriodaphnia dubia4 = Verified data |
High | ||||||||
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0.0037 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Americamysis bahia4 = Verified data |
High | ||||||||
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0.008 | F3 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Lemna gibba3 = Unverified data of known source |
High | ||||||||
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0.0000024 | F4 F = U.S. EPA ECOTOX database / U.S. EPA pesticide fate database / Miscellaneous WHO documents / FAO data, IPCS INCHEM data (US EPA Databases Related to Pesticide Risk Assessment ) Scenedesmus acutus4 = Verified data |
High | ||||||||
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| General |
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High (class III) | - | - | ||||||||
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108 | B5 B = UK CRD and ACP Evaluation Documents / and other DEFRA (UK) documents; Also Chemicals Regulation Division, Health and Safety Executive (HSE), UK (click here ) Rat5 = Verified data used for regulatory purposes |
Moderate | ||||||||
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127.0 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.06 | L3 L = Pesticide manuals and hard copy reference books / other sources Rat3 = Unverified data of known source |
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0.0004 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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0.001 | A5 A = EU regulatory and evaluation data as published by EC, EFSA (RAR, DAR & Conclusion dossiers), EMA (e.g. EU Annex III PIC DGD) (EU - Pesticides database; EFSA Scientific Publications ) 5 = Verified data used for regulatory purposes |
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List I | - | - | ||||||||
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Occupational exposure may occur through inhalation and dermal contact | ||||||||||
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| Health issues |
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CLP data - suspected carcingen; US EPA - probable human carcinogen | ||||||||||||||||||||||||||||
| Handling issues |
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IMDG Transport Hazard Class 6.1 | |||
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Health: H301, H311, H315, H318, H330, H335, H351, H361d, H372 Environment: H400, H410 |
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II (Moderately hazardous) | |||
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UN2786 | |||
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fentin hydroxide | ||
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fentine hydroxyde | ||
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Fentinhydroxid | ||
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fentin hydroxid | ||
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fentin idrossido | ||
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hidróxido de fentin | ||
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wodorotlenek fentinu | ||
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fentin hidroxid | ||
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fentinhydroxide | ||
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| Record last updated: | 27/10/2025 |
| 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 |







