Registration Dossier
Registration Dossier
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 500-057-6 | CAS number: 27104-30-9
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data

Endpoint summary
Administrative data
Description of key information
LD50 oral (Combined Male/Female rats) = 625 mg Active Ingredient (AI)/kg bw. Therefore, THPC-urea is considered as harmful by oral route
LD50 dermal (rat): > 1306 mg AI/ kg BW. Therefore, THPC urea is considered as not harmful by dermal route.
Acute toxicity by inhalation route: no data available.
Key value for chemical safety assessment
Acute toxicity: via oral route
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 625 mg/kg bw
- Quality of whole database:
- Two studies were available with good reliability (Kr. 2). The tests were performed in compliance with international guidance requirements with acceptable restrictions.
Acute toxicity: via inhalation route
Endpoint conclusion
- Endpoint conclusion:
- no study available
Acute toxicity: via dermal route
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed
- Quality of whole database:
- Key study performed according to the 0ECD 402 guideline study and in compliance with the GLP (Klimisch score = 1).
Additional information
1- Acute oral toxicity:
Two studies were available with reliability 2 according to Klimisch rating (Kr).
- A study report (SPL, 1991) has been chosen as key study for this endpoint. This study was conducted according to OECD guideline 401 and in compliance with GLP. Groups of Sprague-Dawley rats (5/sex/group) were administered by gavage a single dose of a water solution of the registered substance (THPC-urea) (around 65% active ingredient – AI) at doses of 325, 650 and 1300 mg AI/kg and observed for 14 days. Hunched posture, ataxia, lethargy, ptosis, laboured respiration, piloerection, dehydratation, and occasional body tremors were observed. At necropsy, abnormalities were observed in the liver, lungs, kidneys, stomach and gastrointestinal tract. Oral LD50 Female = 650 mg AI/kg (410 -1027), Oral LD50 Male = 606 mg AI/kg (431 - 851) and Oral LD50 Combined Males/Females = 625 mg AI/kg (477 -820)
- A study report (SPL, 1991) has been chosen as supporting study. Groups of Sprague-Dawley rats (five males and five females) were given a single oral dose of a diluted THPC-urea solution (around 32.5% AI) at doses of 162, 325 and 650 mg AI/kg bw and observed for 14 days. As in the key study, Signs of intoxication were hunched posture, ataxia, lethargy, ptosis, laboured respiration, piloerection, dehydratation, and occasional body tremors and at necropsy, abnormalities were observed in the liver, lungs, kidneys, stomach and gastrointestinal tract.
The LD50 values were approximately 580, 730 and 650 mg AI/kg for males, females, and males plus females respectively.
Taken these results together, THPC-urea is considered as harmful if swallowed according to EU criteria.
2- Acute dermal toxicity:
One study is available for this endpoint and considered as the key study (SPL, 1994). This study was conducted according to OECD guideline 402 and in compliance with GLP (Kr: 1). Groups of Sprague-Dawley rats (5/sex/group) were dermally exposed to a water solution of THPC-urea (around 65% Active Ingredient – AI) at a limit dose level of 2000 mg test material/kg bw (equivalent to 1306 mg AI/kg bw) and observed for 14 days. There were no deaths. Signs of toxicity or skin irritation disappear before the end of the 14 -day observation period. All animals showed expected gain in body weight, except for 2 females which showed body weight loss during the first week of the study. No abnormalities were noted at necropsy.The dermal LD50 combined of THPC-urea was estimated to be greater than 1306 mg AI/kg bw, without neither deaths nor systemic effects observed during the study period. Thus the registered substance is considered as not harmful by dermal route according to EU criteria.
3-
Acute inhalation toxicity: No
data was available.
Justification for selection of acute toxicity – oral endpoint
Key study performed according to the 0ECD 401 guideline study and in
compliance with the GLP (Klimisch score = 2). Furthermore, in the
supporting study LD50 for female and combined sexes have been
extrapolated
Justification for selection of acute toxicity – inhalation endpoint
Waiving based on the corrosive properties of the submitted substance.
Justification for selection of acute toxicity – dermal endpoint
Only one study was available.
Justification for classification or non-classification
1- Acute oral toxicity:
Based on LD50 Combined Males/Females = 625 mg AI/kg from Kr 2 study according to OECD 401.
THPC-urea is classified in category 4, H302 according to the CLP regulation (1272/2008) and as harmful if swallowed (Xn; R22) according to the Directive 67/548/EEC criteria.
2- Acute dermal toxicity:
Not classified according to the EU legislation (Directive 67/548/EEC and CLP regulation (1272/2008)) as the dermal LD50 combined of THPC-urea was found to be greater than 1306 mg AI/kg bw without neither deaths nor systemic effects observed during the study period
3- Acute inhalation toxicity:
No classification is possible due to lack of data.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
