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Oxytetracycline hydrochloride
Last updated: 30/06/2022
(Also known as: terramycin; oxytracyl; oxytetrin; terramitsin; oxitetracycline; crop antibiotic)

Data 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.

Environmental fate Ecotoxicity Human health
Environmental fate
Moderate alert:
Potential for particle bound transport: Medium
Ecotoxicity
Moderate alert:
Bees acute unknown ecotoxicity: Moderate
Human health
Moderate alert:
Reproduction/development effects
GENERAL INFORMATION
Description
A highly active broad spectrum antibiotic used to control infection animals diseses and bacterial pathogens
Availability status
Current
Introduction & key dates
-
Examples of species treated
Calves, Non-lactating dairy cattle, Beef, Pigs, Fish, Poultry, Cats, Dogs
Chemical structure
Isomerism
A complex molecule with 6 chiral centres
Chemical formula
C₂₂H₂₅ClN₂O₉
Canonical SMILES
CC1(C2C(C3C(C(=O)C(=C(C3(C(=O)C2=C(C4=C1C=CC=C4O)O)O)O)C(=O)N)N(C)C)O)O.Cl
Isomeric SMILES
C[C@@]1([C@H]2[C@@H]([C@H]3[C@@H](C(=O)C(=C([C@]3(C(=O)C2=C(C4=C1C=CC=C4O)O)O)O)C(=O)N)N(C)C)O)O.Cl
International Chemical Identifier key (InChIKey)
SVDOODSCHVSYEK-IFLJXUKPSA-N
International Chemical Identifier (InChI)
-
2D structure diagram/image available?
Yes
Cambridge Crystallographic Data Centre diagrams
Common Name Relationship Link
oxytratracycline Parent
General status
Veterinary substance type
Bactericide, Antimicrobial, Antiseptic
Substance groups
Micro-organism derived substance
Minimum active substance purity
-
Known relevant impurities
-
Substance origin
Natural
Mode of action
Broad spectrum, protein synthesis inhibitor and binds to the 30S and 50S bacterial ribosomal subunits
Molecular targets
[30S ribosomal protein S9, antagonist], [30S ribosomal protein S4, antagonist], [16S rRNA, antagonist]
CAS RN
2-58-46-0
EC number
218-161-2
CIPAC number
-
US EPA chemical code
-
PubChem CID
-
ATCvet Code
QD06AA03 for topical use; QJ01AA06 for systemic use; Others available
Therapeutic Class
Dermatologicals: Antibiotics and chemotherapeutics for dermatological use; Antiinfectants for systemic use: Antibacterials for systemic use
Controlled Drug?
No
Regulation 37/2010 MRL Classification
Allowed substance (Table 1: All food producing species)
Molecular mass
496.90
PIN (Preferred Identification Name)
(4S,4aR,5S,5aR,6S,12aR)-4-(dimethylamino)-1,5,6,10,11,12a-hexahydroxy-6-methyl-3,12-dioxo-4,4a,5,5a-tetrahydrotetracene-2-carboxamide;hydrochloride
IUPAC name
(4S,4aR,5S,5aR,6S,12aR)-4-(dimethylamino)-1,5,6,10,11,12a-hexahydroxy-6-methyl-3,12-dioxo-4,4a,5,5a-tetrahydrotetracene-2-carboxamide;hydrochloride
CAS name
-
Other status information
Possible groundwater contaminant
Relevant Environmental Water Quality Standards
-
Physical state
Yellow crystalline powder
Related substances & organisms
Formulations
Property
Product
Manufacturer
Authorisation Route
UK Legal Class
Example products using this active
Alamycin LA Injection 300mg/ml Norbrook Labs UK National authorisation Prescription only medicine to be authorised by a veterinarian (POM-V)
Engemycin DD Solution for Injection Intervet International EU Mutually recognised procedure Prescription only medicine to be authorised by a veterinarian (POM-V)
Alamycin Aerosol 3.58% w/w Cutaneous Spray, Solution Norbrook Laboratories Limited UK National authorisation Prescription only medicine to be authorised by a veterinarian (POM-V)
Cyclosol LA 200mg/ml Solution for Injection Eurovet Animal Health B.V. EU Mutually recognised procedure Prescription only medicine to be authorised by a veterinarian (POM-V)
Formulation and application details
Supplied as a water soluble powder for preparation as injection when used as a veterinary product. For crop protection it is used as a foliar spray
ENVIRONMENTAL FATE
Property
Value
Source; quality score; and other information
Interpretation
Solubility - In water at 20 °C (mg l⁻¹)
1000
R4 R = Peer reviewed scientific publications
4 = Verified data
High
Solubility - In organic solvents at 20 °C (mg l⁻¹)
- - -
Melting point (°C)
121
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
-
Boiling point (°C)
- - -
Degradation point (°C)
- - -
Flashpoint (°C)
- - -
Octanol-water partition coefficient at pH 7, 20 °C
P
6.03 X 10-02 Calculated -
Log P
-1.22
R4 R = Peer reviewed scientific publications
4 = Verified data
Low
Fat solubility of residues
Solubility
- - -
Data type
- - -
Density (g ml⁻¹)
1.63
Q2 Q = Miscellaneous data from online sources
2 = Unverified data of unknown source
-
Dissociation constant pKa) at 25 °C
4.5
R4 R = Peer reviewed scientific publications
4 = Verified data
-
Weak acid
Vapour pressure at 20 °C (mPa)
1.29 X 10-19
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
at 25 °C
Low volatility
Henry's law constant at 25 °C (Pa m³ mol⁻¹)
1.72 X 10-20
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
at 25 °C
Non-volatile
Maximum UV-vis absorption L mol⁻¹ cm⁻¹
- - -
Surface tension (mN m⁻¹)
- - -
Refractive Index
- - -
Degradation
Property
Value
Source; quality score; and other information
Interpretation
Soil degradation (days) (aerobic)
DT₅₀ (typical)
18
R4 R = Peer reviewed scientific publications
4 = Verified data
Non-persistent
DT₅₀ (lab at 20 °C)
21
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 )
3 = Unverified data of known source
Non-persistent
DT₅₀ (field)
- - -
DT₉₀ (lab at 20 °C)
- - -
DT₉₀ (field)
- - -
Note
Literature estimates give DT₅₀ 1 to 10 wks
Manure DT₅₀ (days)
43.8
R4 R = Peer reviewed scientific publications
4 = Verified data
Aerobic sediment slurry; Other data 79 days slurry
-
Aqueous photolysis DT₅₀ (days) at pH 7
Value
- - -
Note
-
Aqueous hydrolysis DT₅₀ (days) at 20 °C and pH 7
Value
- - -
Note
-
Water-sediment DT₅₀ (days)
- - -
Water phase only DT₅₀ (days)
9
R3 R = Peer reviewed scientific publications
3 = Unverified data of known source
Moderately fast
Soil adsorption and mobility
Property
Value
Source; quality score; and other information
Interpretation
Linear
Kd
698
R4 R = Peer reviewed scientific publications
4 = Verified data
Non-mobile
Koc
52875
Notes and range
Literature data: Kd range 417-1626 mL g⁻¹, Koc range 27792-93317 mL g⁻¹, soils=4; Other Literature data 27792-93317 generally quoted for tetracyclines (R4)
Freundlich
Kf
- - -
Kfoc
-
1/n
-
Notes and range
-
pH sensitivity
-
Fate indices
Property
Value
Source; quality score; and other information
Interpretation
GUS leaching potential index
-0.96 Calculated Low leachability
Bio-concentration factor
BCF (l kg⁻¹)
0.6
J2 J = Pesticide Action Network database (click here )
2 = Unverified data of unknown source
Mollusca
Low potential
CT₅₀ (days)
Not available -
Known metabolites

None

ECOTOXICOLOGY
Terrestrial ecotoxicology
Property
Value
Source; quality score; and other information
Interpretation
Mammals - Acute oral LD₅₀ (mg kg⁻¹)
> 4800
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
Rat
Low
Mammals - Short term dietary NOEL
(mg kg⁻¹)
- - -
(ppm diet)
- -
Mammals - Chronic 21d NOAEL (mg kg⁻¹ bw d⁻¹)
- - -
Birds - Acute LD₅₀ (mg kg⁻¹)
> 5620
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 )
4 = Verified data
Anas platyrhynchos
Low
Birds - Short term dietary (LC₅₀/LD₅₀)
- - -
Birds - Chronic 21d NOEL (mg kg⁻¹ bw d⁻¹)
- - -
Earthworms - Acute 14 day LC₅₀ (mg kg⁻¹)
1954
R4 R = Peer reviewed scientific publications
4 = Verified data
Low
Earthworms - Chronic NOEC, reproduction (mg kg⁻¹)
- - -
Soil micro-organisms
- - -
Collembola
Acute LC₅₀ (mg kg⁻¹)
- - -
Chronic NOEC (mg kg⁻¹)
- - -
Non-target plants
- - -
- - -
Honeybees (Apis spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Unknown mode acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
100
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 )
3 = Unverified data of known source
Moderate
Chronic
- - -
Bumblebees (Bombus spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
-
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
-
Mason bees (Osmia spp.)
Contact acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Oral acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg bee⁻¹)
- - -
Other bee species (1)
Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)
- - -
Mode of exposure
-
Other bee species (2)
Acute LD₅₀ (worst case from 24, 48 and 72 hour values - μg insect⁻¹)
- - -
Mode of exposure
-
Beneficial insects (Ladybirds)
- - -
Beneficial insects (Lacewings)
- - -
Beneficial insects (Parasitic wasps)
- - -
Beneficial insects (Predatory mites)
- - -
Beneficial insects (Ground beetles)
- - -
Aquatic ecotoxicology
Property
Value
Source; quality score; and other information
Interpretation
Fish - Acute 96 hour LC₅₀ (mg l⁻¹)
116
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 )
4 = Verified data
Oncorhynchus mykiss
Low
Fish - Chronic 21 day NOEC (mg l⁻¹)
- - -
Aquatic invertebrates - Acute 48 hour EC₅₀ (mg l⁻¹)
102
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 )
4 = Verified data
Daphnia magna
Low
Aquatic invertebrates - Chronic 21 day NOEC (mg l⁻¹)
46.2
R3 R = Peer reviewed scientific publications
3 = Unverified data of known source
Daphnia magna
Low
Aquatic crustaceans - Acute 96 hour LC₅₀ (mg l⁻¹)
- - -
Sediment dwelling organisms - Acute 96 hour LC₅₀ (mg l⁻¹)
- - -
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l⁻¹)
- - -
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg⁻¹)
- - -
Aquatic plants - Acute 7 day EC₅₀, biomass (mg l⁻¹)
- - -
Algae - Acute 72 hour EC₅₀, growth (mg l⁻¹)
0.342
R4 R = Peer reviewed scientific publications
4 = Verified data
Selenastrum capricornutum
Moderate
Algae - Chronic 96 hour NOEC, growth (mg l⁻¹)
0.183
R4 R = Peer reviewed scientific publications
4 = Verified data
Selenastrum capricornutum
Moderate
Mesocosm study data
NOEAEC mg l⁻¹
- - -
NOEAEC mg l⁻¹
- - -
HUMAN HEALTH AND PROTECTION
General
Property
Value
Source; quality score; and other information
Interpretation
Threshold of Toxicological Concern (Cramer Class)
High (class III) - -
Mammals - Acute oral LD₅₀ (mg kg⁻¹)
> 4800
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
Rat
Low
Mammals - Dermal LD₅₀ (mg kg⁻¹ body weight)
5700
L3 L = Pesticide manuals and hard copy reference books / other sources
3 = Unverified data of known source
Mouse
-
Mammals - Inhalation LC₅₀ (mg l⁻¹)
- - -
Other Mammal toxicity endpoints
Intraperitoneal LD₅₀ = 260 mg kg⁻¹
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
Mouse
-
Intravenous LD₅₀ = 260 mg kg⁻¹
V3 V = ChemID Online Databases; Chemspider; PubChem. (ChemID )
3 = Unverified data of known source
Rat
-
ADI - Acceptable Daily Intake (mg kg⁻¹ bw day⁻¹)
- - -
ARfD - Acute Reference Dose (mg kg⁻¹ bw day⁻¹)
- - -
AAOEL - Acute Acceptable Operator Exposure Level (mg kg⁻¹ bw day⁻¹)
- - -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg⁻¹ bw day⁻¹)
- - -
Dermal penetration studies (%)
- - -
Dangerous Substances Directive 76/464
- - -
Exposure Routes
Public
-
Occupational
-
Mammalian dose elimination route and rate
Systemically available oxytetracycline was primarily excreted in the urine and bile
Q3 Q = Miscellaneous data from online sources
3 = Unverified data of known source
-
Health issues
Specific human health issues
Carcinogen
Genotoxic
Endocrine disruptor
XNo, known not to cause a problem
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
No data found
Reproduction / development effects Acetyl cholinesterase inhibitor Neurotoxicant
?Possibly, status not identified
XNo, known not to cause a problem
XNo, known not to cause a problem
Respiratory tract irritant Skin irritant Skin sensitiser
XNo, known not to cause a problem
Yes, known to cause a problem
?Possibly, status not identified
Eye irritant Phototoxicant  
Yes, known to cause a problem
No data found  
General human health issues
May cause hypersensitivity reactions
May cause tooth discoloration
Handling issues
Property
Value and interpretation
General
No information available
CLP classification 2013
-
WHO Classification
Not listed (Not listed)
UN Number
-
Waste disposal & packaging
-
Shelf-life, storage, stability and reactivity
-
TRANSLATIONS
Language
Name
English
oxytetracycline hydrochloride
French
oxytetracycline
German
Oxytetracyclin
Danish
oxytetracyclin
Italian
oxytetracicline
Spanish
oxitetraciclina
Greek
-
Polish
oksytetracyklina
Swedish
-
Hungarian
-
Dutch
-
Norwegian
-

Record last updated: 30/06/2022
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