The Experts below are selected from a list of 6 Experts worldwide ranked by ideXlab platform
Michael Arand - One of the best experts on this subject based on the ideXlab platform.
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Oxalsäuredinitril [MAK value documentation in German language, 2019]
The MAK Collection for Occupational Health and Safety, 2019Co-Authors: Andrea Hartwig, Michael ArandAbstract:German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re‐evaluated the maximum concentration at the workplace (MAK value) and the Pregnancy Risk Group of Oxalonitrile [460‐19‐5]. There are no new data. The MAK value of 5 ml/m3 was determined in analogy to the more toxic metabolite hydrogen cyanide. The MAK value for hydrogen cyanide of 1.9 ml/m3 was derived from the human detoxification capacity per kg body weight with a respiratory volume of 10 m3. Therefore, the increased respiratory volume at the workplace has already been accounted for. The MAK value of Oxalonitrile, which was set at 5 ml/m3 to reflect the 2.5‐fold higher acute toxicity of hydrogen cyanide, can be retained. This is also the case for Peak Limitation Category II and the excursion factor of 2 because no irritation was observed in humans below 16 ml/m3. There are no developmental toxicity studies. Therefore, Oxalonitrile is assigned to Pregnancy Risk Group D.
Andrea Hartwig - One of the best experts on this subject based on the ideXlab platform.
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Oxalsäuredinitril [MAK value documentation in German language, 2019]
The MAK Collection for Occupational Health and Safety, 2019Co-Authors: Andrea Hartwig, Michael ArandAbstract:German Commission for the Investigation of Health Hazards of Chemical Compounds in the Work Area has re‐evaluated the maximum concentration at the workplace (MAK value) and the Pregnancy Risk Group of Oxalonitrile [460‐19‐5]. There are no new data. The MAK value of 5 ml/m3 was determined in analogy to the more toxic metabolite hydrogen cyanide. The MAK value for hydrogen cyanide of 1.9 ml/m3 was derived from the human detoxification capacity per kg body weight with a respiratory volume of 10 m3. Therefore, the increased respiratory volume at the workplace has already been accounted for. The MAK value of Oxalonitrile, which was set at 5 ml/m3 to reflect the 2.5‐fold higher acute toxicity of hydrogen cyanide, can be retained. This is also the case for Peak Limitation Category II and the excursion factor of 2 because no irritation was observed in humans below 16 ml/m3. There are no developmental toxicity studies. Therefore, Oxalonitrile is assigned to Pregnancy Risk Group D.
M. Y. Abd El-kaway - One of the best experts on this subject based on the ideXlab platform.
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Thermal studies of some purine compounds and their metal complexes
Journal of Thermal Analysis and Calorimetry, 2010Co-Authors: M. S. Masoud, A. El-merghany, A. M. Ramadan, M. Y. Abd El-kawayAbstract:The mechanism of the decomposition of the entitled compounds and their complexes is studied. Adenine, its Schiff base of salicylaldehyde, and its azo resorcinol derivatives are ended with carbon. However, Oxalonitrile compound is appeared as a final product for adenine acetylacetone and an intermediate for adenine. The thermodynamic parameters of the decomposition reaction were evaluated and discussed. The change of entropy values, Δ S ^#, showed that the transition states are more ordered than the reacting complexes. The thermal processes proceed in complicated mechanisms where the bond between the central metal ion and the ligands dissociates after losing small molecules such as H_2O, NH_3, or HCl. In most cases, the free radical species of the ligands are assigned to exist through decomposition mechanisms. The copper adenine and nickel salicylaldehyde complexes are ended with the metal as a final product. However, the cobalt adenine, its acetylacetone, its salicylaldehyde, cadmium and mercury guanine complexes are ended with metal oxides.
M. S. Masoud - One of the best experts on this subject based on the ideXlab platform.
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Thermal studies of some purine compounds and their metal complexes
Journal of Thermal Analysis and Calorimetry, 2010Co-Authors: M. S. Masoud, A. El-merghany, A. M. Ramadan, M. Y. Abd El-kawayAbstract:The mechanism of the decomposition of the entitled compounds and their complexes is studied. Adenine, its Schiff base of salicylaldehyde, and its azo resorcinol derivatives are ended with carbon. However, Oxalonitrile compound is appeared as a final product for adenine acetylacetone and an intermediate for adenine. The thermodynamic parameters of the decomposition reaction were evaluated and discussed. The change of entropy values, Δ S ^#, showed that the transition states are more ordered than the reacting complexes. The thermal processes proceed in complicated mechanisms where the bond between the central metal ion and the ligands dissociates after losing small molecules such as H_2O, NH_3, or HCl. In most cases, the free radical species of the ligands are assigned to exist through decomposition mechanisms. The copper adenine and nickel salicylaldehyde complexes are ended with the metal as a final product. However, the cobalt adenine, its acetylacetone, its salicylaldehyde, cadmium and mercury guanine complexes are ended with metal oxides.
A. El-merghany - One of the best experts on this subject based on the ideXlab platform.
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Thermal studies of some purine compounds and their metal complexes
Journal of Thermal Analysis and Calorimetry, 2010Co-Authors: M. S. Masoud, A. El-merghany, A. M. Ramadan, M. Y. Abd El-kawayAbstract:The mechanism of the decomposition of the entitled compounds and their complexes is studied. Adenine, its Schiff base of salicylaldehyde, and its azo resorcinol derivatives are ended with carbon. However, Oxalonitrile compound is appeared as a final product for adenine acetylacetone and an intermediate for adenine. The thermodynamic parameters of the decomposition reaction were evaluated and discussed. The change of entropy values, Δ S ^#, showed that the transition states are more ordered than the reacting complexes. The thermal processes proceed in complicated mechanisms where the bond between the central metal ion and the ligands dissociates after losing small molecules such as H_2O, NH_3, or HCl. In most cases, the free radical species of the ligands are assigned to exist through decomposition mechanisms. The copper adenine and nickel salicylaldehyde complexes are ended with the metal as a final product. However, the cobalt adenine, its acetylacetone, its salicylaldehyde, cadmium and mercury guanine complexes are ended with metal oxides.
