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Handbook of Solvents - George Wypych - ChemTech - Ventech!

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1322 Tilman Hahn, Konrad Botzenhart, Fritz Schweinsberg<br />

Solvent Organ-System<br />

Tetrachloromethane<br />

o-Toluidine<br />

stomach, liver, kidney, thyroid gland (rats,<br />

mice)<br />

mamma, skin, bladder, liver, spleen, peritoneum,<br />

connective tissue (rats), vessels<br />

(mice)<br />

Category*<br />

MAK EG ACGIH IARC NTP<br />

3 K3 A2 n.l. n.l.<br />

2 n.i. A3 n.l. R<br />

1,1,2-Trichlorethane liver, suprarenal gland (mice) 3 K3 A4 3 n.l.<br />

Trichloroethylene<br />

Chlor<strong>of</strong>orm<br />

1,2,3-Trichloropropane<br />

kidney; liver, biliary tract, kidney, lung,<br />

cervix, testes, lymphatic system (rats, mice)<br />

stomach, liver, kidney, thyroid gland (mice,<br />

rats)<br />

oral mucosa (mice, rats), uterus (mice),<br />

liver, pancreas, forestomach, kidney,<br />

mamma (rats)<br />

1 K3 A5 2A n.l.<br />

4 K3 A3 n.l. R<br />

2 n.i. A3 2A R<br />

*Categories<br />

MAK (German regulations) 2<br />

1: substances that cause cancer in humans and can be assumed to make a significant contribution to cancer risk. Epidemiological<br />

studies provide adequate evidence <strong>of</strong> a positive correlation between the exposure <strong>of</strong> humans and the<br />

occurrence <strong>of</strong> cancer. Limited epidemiological data can be substantiated by evidence that the substance causes<br />

cancer by a mode <strong>of</strong> action that is relevant to humans.<br />

2: substances that are considered to be carcinogenic for humans because sufficient data from long-term animal<br />

studies or limited evidence from animal studies substantiated by evidence from epidemiological studies indicate<br />

that they can make a significant contribution to cancer risk. Limited data from animal studies can be supported by<br />

evidence that the substance causes cancer by a mode <strong>of</strong> action that is relevant to humans and by results <strong>of</strong> in vitro<br />

tests and short-term animal studies.<br />

3: substances that cause concern that they could be carcinogenic for humans but cannot be assessed conclusively<br />

because <strong>of</strong> lack <strong>of</strong> data. In vitro tests or animal studies have yielded evidence in one <strong>of</strong> the other categories. The<br />

classification in Category 3 is provisional. Further studies are required before a final decision can be made. A<br />

MAK value can be established provided no genotoxic effects have been detected.<br />

4: substances with carcinogenic potential for which genotoxicity plays no or at most a minor role. No significant<br />

contribution to human cancer risk is expected provided the MAK value is observed. The classification is supported<br />

especially by evidence that increases in cellular proliferation or changes in cellular differentiation are important in<br />

the mode <strong>of</strong> action. To characterize the cancer risk, the manifold mechanisms contributing to carcinogenesis and<br />

their characteristic dose-time-response relationships are taken into consideration.<br />

5: substances with carcinogenic and genotoxic potential, the potency <strong>of</strong> which is considered to be so low that, provided<br />

the MAK value is observed, no significant contribution to human cancer risk is to be expected. The classification<br />

is supported by information on the mode <strong>of</strong> action, dose-dependence and toxicokinetic data pertinent to<br />

species comparison.<br />

EG 65<br />

K1: confirmed human carcinogen<br />

K2: compounds which should be considered as carcinogen<br />

K3: compounds with possible carcinogenic evidence<br />

ACGIH 1<br />

A1: confirmed human carcinogen<br />

A2: suspected human carcinogen<br />

A3: confirmed animal carcinogen with unknown relevance to humans<br />

A4: not classifiable as a human carcinogen<br />

A5: not suspected as a human carcinogen

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