Where Is The Answer To Leather Products Endangering Physical Health?

< p > > a href= "http://sjfzxm.com/pioneer/" > people < /a > usually when they have half knowledge of something, they will habitually exaggerate one aspect, especially the "potential threat".

So we began to talk about chrome color change, that chromium is harmful to the human body.

However, this is not the case. Chromium exists widely in the natural environment and even exists in our body as a trace element. The lack of chromium will seriously affect our health. Despite this, the reports of carcinogenicity and teratogenicity of chromium containing products have come to a great extent. Consumers are beginning to wonder whether they should buy leather shoes or whether leather shoes should be worn. What is the harm of leather products to the body? In the face of these doubts, only using data to speak is more reliable, more intuitive and convincing.

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< p > when we discern the difference between trivalent chromium and six valent chromium and the oxidation equilibrium relationship between the two, we can use data model to restore the real situation of chromium in leather products to human health.

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< p > the use of trivalent chromium in leather is not harmful to consumers or workers according to the current scientific research.

And in the latest APPENDIX XV (Kap. B 5.8 (ECHA 2011)) of REACH, it is restated that there is no risk of trivalent chromium.

Therefore, trivalent chromium used in leather is not carcinogenic and allergenic. It has been proved to be harmless and does not belong to substance CMR.

For example, Germany's newly revised consumer goods act requires the use of leather produced and long-term contact with the consumer goods, especially clothing, watchband, bags, backpacks, chairs, sofas, neck bags and leather toys, the six valence chromium content should not exceed 3ppm.

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< p > < a href= > http://sjfzxm.com/news/index_q.asp > < < /a > > the limit of heavy metals involved in foreign product standards, only discriminate the valence state of chromium, but there is no valence state restriction for cadmium, lead and mercury, indicating that chromium heavy metal pollution is only limited to six valent chromium, not including trivalent chromium.

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< p > aiming at the acute toxicity of six valent chromium, some international scholars have established data model for risk assessment.

For example, a pair of shoes using 2 square feet leather for example, after conversion, a pair of shoes leather weight is about 200g, and in the most extreme condition, the maximum content of six valent chromium in leather is about 10ppm, while the half lethal dose of six valent chromium (LD50, oral) is 26mg/kg body weight, and the adverse dose (NOAEL) is 1mg/kg body weight.

From this calculation, adults who weigh 70kg can only reach half lethal dose if they eat 900 pairs of shoes every day. Only 35 pairs of shoes can be eaten every day.

Therefore, if there are six valent chromium in leather products, its acute toxicity risk is far from that of leather consumers.

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< p > in addition, for the carcinogenicity of six valent chromium, a large number of studies have clearly demonstrated that the carcinogenicity of six valent chromium is caused by inhalation or bronchial entry, resulting in lung tumor. Therefore, the concern about carcinogenicity of six valent chromium is not applicable to leather consumer goods.

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< p > for the sensitization of six valent chromium to skin, German scientific and technological workers have found that only less than five parts of millions of people will have allergic reactions by tracking research.

In addition, many other scientific research findings also indicate that the number of people who are very sensitive to six valent chromium is very low.

According to official data, the number of people who responded positively to chromium accounted for 0.4% of the total population.

This is in the same range as many other metals (for Jin Zhimin, 4 times for chromium and 10 times for nickel sensitization), and significantly lower than other allergens, such as certain foods, lactose, grass and so on.

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< p > it is worth noting that the above analysis is based on the worst and most extreme conditions, and the analysis of the maximum amount of six valent chromium available in leather products under this condition.

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< p > < < a > href= > http://cailiao.sjfzxm.com/Matertial/show/default.aspx > < /a >, with the continuous improvement and improvement of leather processing technology, the content of six valent chromium in leather products is very low at present, and leather has been used as the main material for leather shoes and leather products (such as watchband) that contact the skin for many years. The probability of allergic reaction to chromium is still lower than that of many other substances, such as gold, nickel, food ingredients, grass or special organic matter.

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< p > it shows that carcinogenesis and sensitization caused by leather are not so worrisome as some media have done.

Of course, leather workers are still committed to the implementation of standardized process technology, and further research and development, in order to minimize this risk.

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