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In rodents, the upper sensitivity can be related to a shorter plasma half-life of T four than in humans due to considerable variations between species within the transport proteins for thyroid hormones. In plasma, the T 4 half-life is about 12—24 h in rats vs 5—9 days in humans, and the serum ranges of TSH are about 25 instances greater in rodents than in people.
Other skin results have been hyperplasia, hyperkeratosis, irritation, and sebaceous gland hyperplasia, whereas there were no systemic treatment-related lesions. With resorcinol, several initiation—promotion research with hamsters Maruyama et al. Female Syrian golden hamsters 10—20 per group were treated with two subcutaneous injections of. In a study carried out by Hasegawa et al.
From its use in topical medication and from restricted data from occupational studies, resorcinol doesn't seem like irritating to the pores and skin within the concentrations reported. Van Leeuwen et al. There is no indication as as to if the teratogenic effects were endocrine mediated or not EC, c. In people, dermal publicity to resorcinol has been reported to be related to thyroid results, CNS disturbances, red blood cell modifications, and a low incidence of pores and skin sensitization. Five of 3.
Determination of resorcinol conjugates in the h urine samples after 14 days of continuous product therapy confirmed that a maximal 23 mg 2. Assuming a physique weight of sixty four kg IPCS, gives an exposure estimate of 0. In a report based mostly on client analysis knowledge Gans, , underneath affordable maximum-use conditions i.

From the scarce data out there, using resorcinol in hair dyes zero. The use of anti-acne cream is taken as the scenario of most concern due to the probability of steady exposure.


Fifty per cent of survivors were sacrificed 1 week later, and blood and urine samples had been taken. Resorcinol confirmed a focus-dependent increase in labelling index [ three H]thymidine , acanthosis, and papillomatosis. After software of an ointment containing To examine the goitrogenic activity of resorcinol, female Wistar rats were handled twice every day for 28 days by rubbing 6 g of an ointment containing Increased thyroid gland weights 2.
For the benthic and terrestrial compartments, the obtainable toxicity data cannot be considered enough for a quantitative risk characterization. However, these compartments are less relevant for resorcinol, due to marginal releases and emissions to these compartments as well as a really low potential for adsorption of resorcinol to natural matter.
In each species, there were no adverse results on final mean physique weights, haematology, or clinical chemistry parameters, and no chemical-related gross or microscopic lesions had been noticed. In one other examine, rats have been uncovered to zero or zero. No thyroid hormone measurements had been carried out.





  • Exposure to resorcinol by way of peeling brokers presents an acute exposure scenario the place the individual is exposed to a high focus 7.




  • However, the uncovered area cm 2 was significantly in excess of the average space of skin often treated for pimples.




  • In people, dermal publicity to resorcinol has been reported to be related to thyroid effects, CNS disturbances, red blood cell changes, and a low incidence of skin sensitization.




  • However, these compartments are much less relevant for resorcinol, due to marginal releases and emissions to those compartments in addition to a really low potential for adsorption of resorcinol to organic matter.




  • There isn't any indication as as to whether the teratogenic effects were endocrine mediated or not EC, c.




  • After software of an ointment containing To study the goitrogenic activity of resorcinol, female Wistar rats were treated twice daily for 28 days by rubbing 6 g of an ointment containing Increased thyroid gland weights 2.




  • However, considering the obtainable research for toxicity to aquatic vegetation, the NOEC for algae can be assumed to be larger than that for Daphnia magna.






Thyroid glands from all surviving F 0 dad and mom have been examined microscopically, and brain measurements had been carried out on all uncovered F 1 pups and people F 1 pups chosen for behavioural testing. There have been no important intercourse variations. In females, a higher proportion was excreted as sulfate conjugate, whereas males excreted a better proportion of a diconjugate both sulfate and glucuronide teams. From these data, the authors concluded that male rats have a higher capacity for glucuronidation than females.


The effects had been more pronounced at 72 h. The irritation index was given as four. However, owing to missing correlating histopathological modifications within the three ranges of the brain examined and within the absence of a dose—response relationship, other indicators of developmental delay, or different modifications in CNS operate, these effects were not thought of as conclusive proof of a change in CNS operate. In the subsequent two-technology reproductive toxicity research RTF, , these finish-factors were not investigated. No resorcinol-related effects on F zero and F 1 pup survival or the general bodily situation of the pups during the pre-weaning period have been noticed.
Especially in rats, lengthy-time period perturbations of the pituitary—thyroid axis attributable to xenobiotics or physiological alterations e. For the thyroid, a non-statistically vital increase in TSH ranges was reported for interim males, however not at scheduled necropsy. In high-dosed females, T three levels had been elevated, while there was no impact on T three or T 4 ranges in males.
The bulk of the urine-recovered dye should have been taken up into the horny layer of the pores and skin and then slowly launched into the circulation. A cumulative 4-day absorption assuming cm 2 of scalp was given as 0.
Resorcinol is known to form covalent bonds with haem Sessler et al. Effects on the thyroid gland have been reported both in animal studies and in case-reviews in people. However, there are species variations in the susceptibility to goitrogens.


The tolerable consumption of zero. It is due to this fact attainable that these neurological results are as a result of acute effect of the gavage administration. CNS results in people and animals have been related to acute exposure to resorcinol.
Hence, an improved biodegradation rate leads to lowered risks for the surroundings. Regarding the consequences of resorcinol on aquatic species, the toxicity data set includes quite a lot of species from different trophic ranges. Results from checks with totally different aquatic species from totally different trophic levels can be found for the acute toxicity of resorcinol to aquatic organisms.