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EC number: 203-699-2 | CAS number: 109-73-9
- 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
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_toxicological-information.png)
Endpoint summary
Administrative data
Description of key information
The substance is acutely toxic after oral, dermal or inhalation exposure. The following LD/LC50 values were determined in experimental studies:
oral, rat: 372 mg/kg bw
dermal, guinea pig: 429 mg/kg bw
inhalation, rat: 4200 mg/m3
Key value for chemical safety assessment
Acute toxicity: via oral route
Link to relevant study records
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Comparable to guideline study with acceptable restrictions, only short communication, sufficiently documented
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 401 (Acute Oral Toxicity)
- Deviations:
- yes
- Remarks:
- vehicle: corn oil instead of aqueous solution; survivors not examined at the end of the 14-d observation period
- Principles of method if other than guideline:
- Comparative study including tert. butylamine, sec-butylamine, isobutylamine and n-butylamine.
- GLP compliance:
- not specified
- Limit test:
- no
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River Breeding Laboratories, Wilmington, MA
- Age at study initiation: not stated
- Weight at study initiation: males: 195 +/- 20.5 g; females: : 156 +/- 16.8 g
- Fasting period before study: yes, overnight
- Housing: two animals per cage
- Diet: Rodent Laboratory Chow from Ralston Puirna Co. , St. Louis, MO; ad libitum
- Water: tap water ad libitum
- Acclimation period: 2 weeks
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 22-26
- Humidity (%): 22-49
- Air changes (per hr): not stated
- Photoperiod (hrs dark / hrs light): 12/12
IN-LIFE DATES: From: treatement To: end of 14-day observation period - Route of administration:
- oral: gavage
- Vehicle:
- other: corn oil
- Details on oral exposure:
- VEHICLE
- Concentration in vehicle: variable dose
- Amount of vehicle (if gavage):
- Justification for choice of vehicle: no data
MAXIMUM DOSE VOLUME APPLIED: 4 mL/kg bw
- Doses:
- 100, 200, 300, 400, 500, 600 mg/kg bw (in 4 ml corn oil)
- No. of animals per sex per dose:
- 10
- Control animals:
- no
- Details on study design:
- - Duration of observation period following administration: 14 days
- Frequency of observations and weighing: not reported, probably daily
- Necropsy of survivors performed: no
- Other examinations performed: clinical signs, body weight (bw not documented), necropsy of animals that died - Statistics:
- Statistical data evaluation: LD50-values were calculated using the probit method of Finney (1971). Data for male and female animals were compared statistically for each compound by the chi-square contingency table analysis (Snedecor and Cochran, 1967).
- Key result
- Sex:
- male/female
- Dose descriptor:
- LD50
- Effect level:
- 371.8 mg/kg bw
- 95% CL:
- 307.8 - 458.4
- Remarks on result:
- other: in corn oil
- Key result
- Sex:
- male
- Dose descriptor:
- LD50
- Effect level:
- 365.7 mg/kg bw
- 95% CL:
- 283.6 - 475.8
- Key result
- Sex:
- female
- Dose descriptor:
- LD50
- Effect level:
- 382.4 mg/kg bw
- 95% CL:
- 278.1 - 490.5
- Mortality:
- Number of deaths: not reported
Time to death: generally 1 - 3 h post-administration - Clinical signs:
- other: Sedation, ataxia, salivation, nasal discharge, gasping, and at higher doses, also convulsions
- Gross pathology:
- Deceased animals mainly exhibited pulmonary edema.
Surving animals appeared normal after 14 d and were not further examined. - Interpretation of results:
- Category 4 based on GHS criteria
- Conclusions:
- Under the experimental conditions an oral LD50 of 371.8 mg/kg bw was determined in male/female rats.
- Executive summary:
The acute oral LD50value of n-butylamine was determined in male and female Sprague-Dawley CD rats in a dose range of 100 -600 mg/kg bw. Signs of toxicity observed after single oral doses of the monobutylamines included sedation, ataxia, nasal discharge, gasping, and salivation followed by convulsions and death at the higher dose levels. Gross pathological examination of animals that died after the monobutylamine treatment revealed pulmonary edema. The LD50 values were calculated by the probit method of D. J. Finney. The LD50 for n-butylamine after an observation period of 14 days was 365.4 mg/kg bw in male rats and 382.7 mg/kg bw for female rats (mean 371.8 mg/kg bw).
Reference
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 372 mg/kg bw
- Quality of whole database:
- sufficient for evaluation
Acute toxicity: via inhalation route
Link to relevant study records
- Endpoint:
- acute toxicity: inhalation
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 403 (Acute Inhalation Toxicity)
- Principles of method if other than guideline:
- BASF-Test.
- GLP compliance:
- no
- Test type:
- standard acute method
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: WIGA, Sulzfeld and MUS RATTUS, Brunnthal, Germany
- Weight at study initiation: 185 ± 15 g.
- Diet: Herilan MRH ( EGGERSMANN KG, Rinteln/Weser, Germany), ad libitum
- Water: tap water ad libitum - Route of administration:
- inhalation: vapour
- Type of inhalation exposure:
- whole body
- Vehicle:
- other: unchanged (no vehicle)
- Details on inhalation exposure:
- GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION
- Exposure apparatus: continuous infusion pump leading to a vaporisation unit, heatad to 70 °C, vapour mixed with fresh air to achieve the tst atmosphere
- Exposure chamber volume: 200 L
- Method of holding animals in test chamber: in cages within the inhalation chamber
TEST ATMOSPHERE
- Brief description of analytical method used: gas chromatography (HP 5840 A)
- Samples taken from breathing zone: no
- Analytical verification of test atmosphere concentrations:
- yes
- Duration of exposure:
- 4 h
- Concentrations:
- nominal: 1.48, 7.38, 8.9, 11.1 mg/L
analytical: 0.98, 3.11, 4.94, 7.29 mg/L - No. of animals per sex per dose:
- 10
- Control animals:
- yes
- Details on study design:
- - Duration of observation period following administration: 14 days
- Frequency of observations: several times on the day of exposure and daily thereafter
- Frequency of weighing: days 0, 7 and 14
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight - Key result
- Sex:
- male/female
- Dose descriptor:
- LC50
- Effect level:
- 4.2 mg/L air (analytical)
- 95% CL:
- 3.6 - 4.7
- Exp. duration:
- 4 h
- Key result
- Sex:
- male
- Dose descriptor:
- LC50
- Effect level:
- 4.7 mg/L air (analytical)
- 95% CL:
- 3.7 - 5.7
- Exp. duration:
- 4 h
- Key result
- Sex:
- female
- Dose descriptor:
- LC50
- Effect level:
- 3.7 mg/L air (analytical)
- Exp. duration:
- 4 h
- Mortality:
- See details in remarks on results.
- Clinical signs:
- other: 3.11, 4.94 and 7.29 mg/l air: watery eye and nose discharge, snout wiping, eyelid closure, dyspnoea, apathy, corneal opacity, squatting posture, trembling gait, ruffled fur. 0.92 mg/l air: watery eye and nose discharge, intermittend and irregular respir
- Body weight:
- Reduced weight/weight gain. See details in remarks on results.
- Gross pathology:
- Animals that died:
Heart: acute dilatation, acute congestion;
Lung: slight to moderate distension;
Liver: pivotally lobular pattern.
Sacrificed animals: no abnormalities. - Interpretation of results:
- Category 3 based on GHS criteria
- Conclusions:
- Under the conditions of the test an LC50 of 4200 mg/m3 was observed in rats.
- Executive summary:
Rats (10 male and females per group were exposed to vapour concentrations of 0.92, 3.11, 4.94 or 7.29 mg/L. Mortality was observed at concentrations of >/= 3.11 mg/L. The LC50 was 4.2 mg/L (4200 mg/m3) for males/females and 4.7 mg/L for males and 3.7 mg/L for females. Symptoms of treatment were severe aqueous-reddish discharge from eyes and nose, apathy, dyspnea,hunched posture,staggering gait, milky turbid corneas. Organ changes consisted in cardiac dilatation with acute hyperemic congestion, slight to moderate acute congestion of the lung.
- Endpoint:
- acute toxicity: inhalation
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 07 March 1986 to 02 April 1986
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 403 (Acute Inhalation Toxicity)
- Deviations:
- no
- GLP compliance:
- yes
- Test type:
- standard acute method
- Limit test:
- yes
- Species:
- rat
- Strain:
- Sprague-Dawley
- Sex:
- male/female
- Route of administration:
- inhalation: vapour
- Type of inhalation exposure:
- whole body
- Details on inhalation exposure:
- GENERATION OF TEST ATMOSPHERE / CHAMBER DESCRIPTION
- Exposure apparatus: perspex material
- Exposure chamber volume: ~130 L,
- Method of holding animals in test chamber: single compartments, separated by wire-mesh partitions
- Source and rate of air: base centre of the chamber
- System of generating particulates/aerosols: no aerosols
- Treatment of exhaust air: collection filter
- Temperature: 23.8 +-0.26 °C (test); 24.9 +-0.33 °C (control)
TEST ATMOSPHERE
- Brief description of analytical method used:
Sampling: 5 samples were drawn through an acetone-containing absorption trap (-70 °C).
Analysis: GC-FID analysis
- Analytical verification of test atmosphere concentrations:
- yes
- Duration of exposure:
- 4 h
- Concentrations:
- nominal: 5 mg/L (1650 ppm) [target concentration]
analytical: 4.6 mg/L - No. of animals per sex per dose:
- 5
- Control animals:
- yes
- Details on study design:
- - Duration of observation period following administration: 14 days
- Frequency of observations: continuously during exposure, at least 2x/d during the observation period
- Frequency of weighing: daily
- Necropsy of survivors performed: yes - Statistics:
- not applicable
- Key result
- Sex:
- male/female
- Dose descriptor:
- LC50
- Effect level:
- > 4.6 mg/L air (analytical)
- Exp. duration:
- 4 h
- Mortality:
- none
- Clinical signs:
- other: - Signs of irritation during exposure: abnormal respiration, lacrimation, closure of eyelids, excessive salivation, abnormal body posture; - Signs of marked adverse effects post-exposure: abnormal respiration, sneezing, rales, gasping (1 - 5 d p.a. in
- Body weight:
- Marked weight loss for 2 - 3 d post-exposure, followed by weight gain similar to or higher than controls
- Gross pathology:
- - Surviving animals: opacity of eyes, red or grey areas found in lungs, in one case congested lung
Referenceopen allclose all
Mortality:
Analytical concentration (mg/l) | male | female | ||||||||||||
7.29 | 9/10 | 10/10 | ||||||||||||
4.94 | 6/10 | 9/10 | ||||||||||||
3.11 | 1/10 | 2/10 | ||||||||||||
0.92 | 0/10 | 0/10 |
Weight:
Dose (mg/l) | Gender | 0 h | 7 days | 14 days | ||||||||||
7.29 | male | 175 | 130 | 156 | ||||||||||
7.29 | female | 172 | - | - | ||||||||||
4.94 | male | 195 | 143 | 173 | ||||||||||
4.94 | female | 173 | 142 | 209 | ||||||||||
3.11 | male | 182 | 156 | 181 | ||||||||||
3.11 | female | 183 | 150 | 158 | ||||||||||
0.92 | male | 186 | 197 | 239 | ||||||||||
0.92 | female | 180 | 199 | 211 | ||||||||||
control | male | 186 | 228 | 265 | ||||||||||
control | female | 176 | 189 | 211 |
The test substance caused systemic toxicity (including mortality) and local irritation in a dose-dependent manner.
Abnormal respiration persisted throughout the observation period (14 d). Histopathological changes in the lungs were evident after 14 d. Opacity of the cornea persisted in male rats.
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed
- Dose descriptor:
- LC50
- Value:
- 4 200 mg/m³ air
- Quality of whole database:
- sufficient for evaluation
Acute toxicity: via dermal route
Link to relevant study records
- Endpoint:
- acute toxicity: dermal
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- other: US regulation, 21 CFR 191.10, application
- Principles of method if other than guideline:
- Method
A) on the intact skin of abdomen of guinea pigs
B) on the abraded skin of the back of guinea pigs - GLP compliance:
- no
- Test type:
- standard acute method
- Limit test:
- no
- Species:
- guinea pig
- Strain:
- Hartley
- Sex:
- male
- Type of coverage:
- occlusive
- Vehicle:
- unchanged (no vehicle)
- Details on dermal exposure:
- TEST SITE
- Skin: shaved and depiliated
- Treatment sites:
A) on the intact skin of abdomen of guinea pigs
B) on the abraded skin of the back of guinea pigs
- Area of exposure: 1 square inch of cellulose pad - Duration of exposure:
- 24 h
- Doses:
- 3 dose groups, no details
- No. of animals per sex per dose:
- 4
- Control animals:
- not required
- Key result
- Sex:
- male
- Dose descriptor:
- LD50
- Effect level:
- 429 other: mg/kg bw (abdomen, intact skin)
- Remarks on result:
- other: 0.58 mL/kg bw given in publication
- Key result
- Sex:
- male
- Dose descriptor:
- LD50
- Effect level:
- 1 100 other: mg/kg bw (back, abraded skin)
- Remarks on result:
- other: 1.5 mL/kg bw given in publication
- Mortality:
- Numbers of deaths not reported.
A higher toxicity was observed for butylamine applied to the abdomen. - Gross pathology:
- Quick and severe skin necrosis
- Other findings:
- A higher toxicity was observed for butylamine applied to the abdomen, which may be explained by the higher sensitivity and responsiveness of the abdominal skin as compared with the dorsal skin.
- Interpretation of results:
- Category 3 based on GHS criteria
- Conclusions:
- Under the conditions of the test a dermal LD50 of 429 mg/kg bw was determined in male guinea pigs.
- Executive summary:
The test substances were occlusively applied to the intact abdome skin or abraded back skin of guinea pigs under the conditions laid down in the US regulation, 21 CFR 191.10.
Quick and severe skin necrosis was observed at the application sites.
The LD50 was 0.58 mL/kg bw (429.0 other: mg/kg bw) for exposure to intact abdomen skin and 1.5 mL/kg bw (1100.0 mg/kg bw) for exposure to abraded back skin
The study examined a comparison between guinea pigs and rabbits in their response to various compounds in regard to acute dermal toxicity and primary irritation.
Of the eight compounds tested for acute dermal toxicity, only one (parathion) would have been placed in a higher toxicity classification by the rabbit test than by the intact guinea pig skin test.
The information obtained in the primary irritation tests showed that the intact guinea pig skin test is as sensitive as, or more sensitive than, the rabbit skin test in eliciting dermal reactions.
Reference
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed
- Dose descriptor:
- LD50
- Value:
- 429 mg/kg bw
- Quality of whole database:
- sufficient for evaluation
Additional information
Acute oral LD50 values obtained from studies in rats range from 372 - 720 mg/kg bw. The lowest value was observed in a reliable study and used for risk assessment. After oral ingestion, signs of toxicity were sedation, ataxia, salivation, nasal discharge, gasping, and at higher doses, also convulsions.
The LC50 values for inhalation range from 4.2 to about to >4.6 mg/L vapour atmosphere (analytical values) in two reliable studies. The study by BASF AG (1979) was selected as key study (though it was RL2), because it reported the lower LC50 and is sufficiently reliable for risk assessment compared to the study by Pennwalt (1987, RL1) with a LC50 of 4600 mg/m3. Following inhalation, severe aqueous-reddish discharge from eyes and nose, apathy, dyspnea, hunched posture, staggering gait, milky turbid corneas were observed. Organ changes consisted in cardiac dilatation with acute hyperemic congestion, slight to moderate acute congestion of the lung.
As for dermal application in experimental animals, LD50 values from 429 to >1000 mg/kg bw have been reported. The lowest value was observed in a reliable study with guinea pigs and is used for risk assessment. Necrosis was observed at the application sites.
Justification for classification or non-classification
The harmonised classification according to Regulation (EC) No 1272/2008 with respect to acute toxicity is Category 4 for the dermal, oral and inhalation route (Acute Tox. 4 H302; Acute Tox. 4 H312; Acute Tox. 4 H 332). These are all minimal classifications from the implementation of Regulation (EC) No 1272/2008.
However, based on experimental LD50/LC50 values, n-butylamine has to be classified as acute oral toxic Cat. 4, acute dermal toxic Cat. 3 and acute inhalative toxic Cat. 3 according to the requirements of Regulation (EC) No 1272/2008.
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.
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