v34 methyl acetate
TRANSCRIPT
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EURAR V34: METHYL ACETATE
1/25
éšå翻蚳
European Union
Risk Assessment Report
METHYL ACETATE
CAS No: 79-20-9
1st Priority List, Volume 34, 2003
欧å·é£å
ãªã¹ã¯è©äŸ¡æž (Volume 34, 2003)
é ¢é žã¡ãã«
åœç«å»è¬åé£åè¡çç 究æ å®å šæ å ±éš
2013幎8æ
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EURAR V34: METHYL ACETATE
2/25
æ¬éšå翻蚳ææžã¯ãmethyl acetate (CAS No: 79-20-9)ã«é¢ããEU Risk Assessment Report, (Vol.
34, 2003)ã®ç¬¬4ç« ãããå¥åº·ãã®ãã¡ã第4.1.2é ã圱é¿è©äŸ¡ïŒæ害æ§ã®ç¹å®ããã³çšéåå¿é¢ä¿ã
ã翻蚳ãããã®ã§ãããåæïŒè©äŸ¡æžå šæïŒã¯ã
http://esis.jrc.ec.europa.eu/doc/risk_assessment/REPORT/methylacetatereport037.pdf
ãåç §ã®ããšã
4.1.2 圱é¿è©äŸ¡ïŒæ害æ§ã®ç¹å®ããã³çšéïŒæ¿åºŠïŒ-åå¿ïŒåœ±é¿ïŒè©äŸ¡
4.1.2.1 ããã·ã³ãããã£ã¯ã¹ã代è¬ãããã³ååž
é ¢é žã¡ãã«ã¯é«ãèžæ°å§ã瀺ãããïŒ20°C 㧠220 hPaïŒãåžå ¥æé²ã®ç¶æ ã¯ãæ®éçã«çãåŸ
ãã氎溶æ§ã§ããããšïŒ295 g/LïŒãš 0.18 ãšããåé ä¿æ°ïŒlog PowïŒããããããã®çµè·¯ããå
ã蟌ãŸããŠããçäœå ã«åºãååžããããšã瀺åãããã
é ¢é žã¡ãã«ã® in vitro ã§ã®å æ°Žå解ã«ã€ããŠã¯ãã©ããããã³ããã®è¡æ¶²äžã§ã®åæžæãã
ãããã 2ïœ3 æéããã³ 4 æéãšæž¬å®ãããŠãããè¡äžã§ã®å æ°Žå解ã¯ã©ããã®æ¹ããã
ãããæ©ãããšã瀺瀺ãããŠããïŒFilov, 1961ïŒããã®å æ°Žå解ã¯ãäžæ¬¡åå¿ã«åãããã®ã§
ãã£ãã
Ghittori et al.ïŒ1984ïŒã¯ã37°C ã®è¡æ¶²äžã«ãããé ¢é žã¡ãã«ã®å æ°Žå解ããŒã¿ïŒæ¿åºŠïŒ2.18
ÎŒg/LïŒ7 æéåŸïŒ1.96 ÎŒg/LïŒãå ±åããŠãããããã㯠FilovïŒ1961ïŒã瀺ããããŒã¿ãããé
ãå€ã§ãã£ãããã®åå¿çæç©ã¯ãé ¢é žãšã¡ã¿ããŒã«ã§ãã£ããšç¢ºèªãããŠããã
æè¿ã®å ±åã§ã¯ïŒMizunuma et al., 1992ïŒãé ¢é žã¡ãã«ïŒ27.9 ÎŒg/mLïŒãããã®è¡æ¶²ãš 36°C 㧠2
ïœ8 æéã€ã³ãã¥ããŒãããããšã«ãããé ¢é žã¡ãã«ããã¡ã¿ããŒã«ãžã® in vitro å æ°Žå解
ã確èªãããŠããããã®åå¿ã®é床ã¯éåžžã«éããé ¢é žã¡ãã«ã¯ããã® 60%ã 2 æéã§ã¡
ã¿ããŒã«ã«å€æããã»ãšãã©ãã¹ãŠã 8 æéã§æ¶å€±ããïŒæ€åºéç㯠0.1 ÎŒg/mLïŒãæ¿åºŠæž¬å®
ã¯ããããã¹ããŒã¹ã¬ã¹ã¯ãããã°ã©ãã£ãŒåæã«ãã£ãŠè¡ãããã¡ã¿ããŒã«ã®çæã¯ã
ã¬ã¹ã¯ãããã°ã©ãã£ãŒ-ãã¹ã¹ãã¯ããã¡ããªãŒæ³ã«ãã詳现ã«ç¢ºèªããããé ¢é žã¡ãã«
ãå æ°Žå解ããèœåã¯ãè¡æ¶²ã®çŽ°èæåããã³é现èåç»ã®äž¡æ¹ã«äžæ§ã«ååžããŠããã
éã®F344ã©ããã®éŒ»ç²èç±æ¥ã®ã«ã«ããã·ã«ãšã¹ãã©ãŒãŒïŒS9ãã¢ãžããŒãïŒãšé ¢é žã¡ãã«
ã®ã€ã³ãã¥ããŒãã«ãããŠãS9-èçœ 1 mg ããã 15 ± 3 nmol/åãšããå æ°Žå解é床ãåŸã
ããŠããïŒDahl et al., 1987ïŒã
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EURAR V34: METHYL ACETATE
3/25
é ¢é žã¡ãã«ããŠãµã®ã«çµå£æäžããå Žåãã¡ã¿ããŒã«ãšé ¢é žã«å æ°Žå解ãããïŒTambo,
1973; BG Chemie, 1995ïŒããã®è©Šéšã§ã¯ã5%氎溶液ãšããŠã20 mL/kgïŒ1,000 mg/kgïŒã®çšéã§
æäžãè¡ããããæäžåŸ 30 åãã 5 æéãŸã§ã®è¡äžã¡ã¿ããŒã«æ¿åºŠã枬å®ããããé ¢é žã¡
ãã«ã¯ã©ã®æç¹ã®è©Šæäžã«ãæ€åºãããªãã£ãããã¡ã¿ããŒã«ã¯ 30 ååŸã«ã¯è¡äžãå°¿äžã§
èªãããããè¡äžã¡ã¿ããŒã«æ¿åºŠã®ããŒã¯ã¯ã3 æéæç¹ã«ããã 0.573 mg/mL ã§ãã£ãã
çµå£æäžãããé ¢é žã¡ãã«ã¯ãæ¶å管ã§å æ°Žå解ãããããããã£ãŠãè¡äžãå°¿äžã§ã¯ã¡
ã¿ããŒã«ãšé ¢é žã ããæ€åºãããé ¢é žã¡ãã«ã¯æ€åºãããªãã£ããåæ§ã«ãåžå ¥æé²åŸã®
è¡äžãå°¿äžã§ã¯ããããã®å æ°Žå解ç£ç©ã ããæ€åºããããæé²åŸ 30ïœ60 åã«ã¯ã¢ã·ããŒ
ã·ã¹ãçŸããããã¯æããã«é ¢é žã®çæã«èµ·å ãããã®ã§ã2ïœ3 æéæç¶ããã
æ°ç®¡åéè¡ãæœãããŠãµã®ãã645 L ã®ãã£ã³ããŒå ã§é ¢é žã¡ãã«ã« 3 æéåžå ¥æé²ãããš
ãããæé²çŽåŸã®åŒæ°å ã«ã¯ãé ¢é žã¡ãã«ããåžå ¥éã® 30ïœ50%以äžïŒ20 mg/L 以äžïŒã®æ¿åºŠ
ã§èªãããããæé²ãçµããåŸã«ã¯ãåŒæ°äžã«é ¢é žã¡ãã«ã¯èªããããªãã£ããé ¢é žã¡ã
ã«ã®åžå ¥æ¿åºŠã¯ç¶æãããŠããããè¡äžã«é ¢é žã¡ãã«ã¯æ€åºãããªãã£ãããã®ããšã¯ã
å æ°Žå解ãè¿ éã§ããããšã瀺ããŠããïŒFilov, 1961; BG Chemie, 1995ïŒã
æè¿å®æœãããã©ãããçšããè©ŠéšïŒHMR, 1999aïŒã®äžã§ãäºæ¥æ§åžå ¥æé²ïŒ5 æ¥/é±ã6 æé/
æ¥ïŒãè¡ãããŠãããæçµæ¥ã«è¡ã£ã 6 æéã®åžå ¥æé²ïŒ2,000 ppmïŒã®çŽåŸã30ã60ã120 å
åŸããã³ 18 æéåŸã®æç¹ã§ãããããé ¢é žã¡ãã«ã®æ¿åºŠã¯ 5 ppm 以äžïŒv/v; < 4.6 mg/LïŒã§ã
ã£ãããã®è©Šéšã§ã¯ãåæç¹ã§ééå 2 å¹ãã€ã®ã©ãããããè¡æ¶²ãµã³ãã«ãæ¡åããã
4 å¹ã®ã©ããããé ¢é žã¡ãã«ãã»ãŒé£œåãã空æ°ã«æé²ïŒ25 L 容åšå ïŒããã10ïœ20 ååŸã«
å¬ç äœçšãèªããããããã®æç¹ã§æé ããŠæ¡åããè¡æ¶²äžã«ãé ¢é žã¡ãã«ã 70ïœ80 mg
/100 mL ã®æ¿åºŠã§æ€åºããããã¡ã¿ããŒã«ã«åžå ¥æé²ããåæ§ã®è©Šéšã§ã¯ããã®å¬ç äœçšã¯ã
äž»ã«é ¢é žã¡ãã«ã«ãã£ãŠèªçºãããããšã瀺ãããŠããïŒFilov, 1964a,b; BG Chemie, 1995ïŒã
çŽ 200 ppm ã®é ¢é žã¡ãã«ïŒ165ïœ290 ppmïŒããã 610 mg/m3ïŒãšã¡ã¿ããŒã«ïŒ160ïœ225 ppmïŒã«
察ãããããã 2 人ã®è¢«éšè ãã1 å 2 æéã1 æ¥ 2 åïŒ2 æéééïŒã§ 3ïœ4 æ¥éå埩åžå ¥æ
é²ããããããããæé²ãè¡ã£ãæ¥ã®æåã®æé²ã«ããå°¿äžã¡ã¿ããŒã«æ¿åºŠãå¢å ãã2 å
ç®ã®æé²åŸ 4 æé以å ã«ããŒã¯ã瀺ããïŒå°¿äžã¡ã¿ããŒã«æ¿åºŠã¯>10 mg/LïŒããããã®å Žåãã
ãã®æ¿åºŠã¯ãç¿æã«ã¯æ£åžžïŒ< 5 mg/LïŒã«æ»ã£ãŠããïŒTada et al., 1974ïŒã
ã¡ã¿ããŒã«ä»£è¬ã®åç©çš®ããšã®ç¹ç°æ§
ã¡ã¿ããŒã«ã¯ãèèã«ãããŠãã¢ã«ã³ãŒã«è±æ°ŽçŽ é µçŽ ã«ãããã«ã ã¢ã«ãããã«ä»£è¬ãã
ãããã«ã ã¢ã«ãããã¯ãããã«ã®é žã«ä»£è¬ããããã®é žååç©ã¯ã¡ã¿ããŒã«ã®æ害代è¬
ç£ç©ãšèããããŠããããã®èç©ã«é¢ããŠã¯ãé¡èãªçš®å·®ãååšãããã®é žã®ä»£è¬ã«ã¯ã
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EURAR V34: METHYL ACETATE
4/25
ãã©ãããèé žååç©ãå¿ èŠãšããããµã«ãšããã¯ããã£æ¯é¡ã«æ¯ã¹ãŠãã¡ã¿ããŒã«ã«å¯Ÿ
ããæåæ§ãé«ããããã¯ãèèã§ã®ããã©ãããèé žååç©æ¿åºŠã®äœãã«ãããã®ã§ã
ãã®ããã«ä»£è¬ãé ããã®é žååç©ã®èç©ãæ¥ããïŒDorman et al., 1994ïŒã
éé·é¡ã§ã¯ã代è¬é床ãè¶ãããããªé«çšéãæäžãããå Žåã«ã®ã¿ãã®é žååç©ãèç©
ãããçšéã 600 mg/kg/æ¥ä»¥äžã®å Žåã¯ããµã«ãšã©ããã®éã®çš®å·®ã¯ãªããšèããããŠãã
ïŒTakeda and Katoh, 1988ïŒããããã£ãŠã代è¬ã«ããã皮差ã¯ãLD50ã LC50ã®ãããªçšéã
æ¥æ§æ¯æ§ãæ±ãå Žåã«ã¯èæ ®ããªããŠã¯ãªããªãã
Andrews et al.ïŒ1987ïŒã®è©Šéšã§ã¯ããµã«ïŒããã³ã©ããïŒããæé« 5,000 ppmïŒããã 6,666
mg/m3ïŒã®ã¡ã¿ããŒã«èžæ°ã« 20 åå埩æé²ããããçµæãšããŠçŒã«å¯Ÿããæ害圱é¿ã¯èªãã
ããŠããªãããããã£ãŠããã®çšéã§ã¯ãæ¯æ§ã瀺ãã»ã©ã®ã®é žã®çæã¯ãªããçŒã®æå·
ãèµ·ããªãã£ããšèããããããã ããã®é žã®è¡äžæ¿åºŠã«ã€ããŠã¯æ€èšãããŠããªããã
ããã®è©Šéšã§ã¯ããµã«ã«ãããŠäžæ¢ç¥çµãžã®åœ±é¿ãã¿ãããŠããªãããããã£ãŠãã©ãã
ããæ€èšãã¹ãçšéïŒèŽæ»éæªæºïŒã«ããããé ¢é žã¡ãã«ã®äºæ¥æ§ãŸãã¯äºæ ¢æ§æ¯æ§äœçšã
è©äŸ¡ããããã«ã¯ãæçšãªã¢ãã«ã§ãããšèããããã
ããã·ã³ãããã£ã¯ã¹ã代è¬ããã³ååžã®ãŸãšã
çµå£æäžãããé ¢é žã¡ãã«ã¯ããã®äžéšã¯ãèç²èã®ãšã¹ãã©ãŒãŒã«ãã£ãŠãæ¶å管å ã§
ã¡ã¿ããŒã«ãšé ¢é žã«å解ããããé ¢é žã¡ãã«ã¯ãŸããè¡äžã®ãšã¹ãã©ãŒãŒã§ãå æ°Žå解ã
ãããã©ããã 2,000 ppmïŒ6,040 mg/m3ïŒã§åžå ¥æé²ããå Žåã§ãåçã®å解ãåããè¡äžæ¿
床㯠4.6 mg/L æªæºã§ãã£ãã飜åæ¿åºŠã«è¿ãæ¿åºŠãé€ããŠã¯ãé«æ¿åºŠã«ãããæ€èšã¯è¡ã
ããŠããªãã飜åæ¿åºŠã«ãããåžå ¥æé²ã§ã¯ãé ¢é žã¡ãã«ãè¡äžã§æ€åºãããŠããã
In vitro ã§ã®å æ°Žå解ã«é¢ããããã€ãã®ããŒã¿ãããé ¢é žã¡ãã«ã®è¡äžåæžæã¯ã倧ãŸã
ã«ã2ïœ3 æéïŒã©ããïŒãããã¯çŽ 2 æéïŒããïŒãšæšå®ãããŠããããšã¹ãã«ã®å æ°Žå解ã«
é¢ããŠã¯ãåŒåžäžç®ã®ã«ã«ããã·ã«ãšã¹ãã©ãŒãŒã®å±æçãªæŽ»æ§ãç¹ã«éèŠã§ããããã
ãã©ããã®éŒ»ã®åŒåžçµç¹ããã³å èŠçµç¹ã«ã€ããŠæ€èšãè¡ãããŠãããã©ããã®éŒ»ã®åŒåž
çµç¹ã®ã«ã«ããã·ã«ãšã¹ãã©ãŒãŒæŽ»æ§ã¯ãããããã 3 åé«ãã£ããäžæ¹ãå èŠçµç¹ã®ã«
ã«ããã·ã«ãšã¹ãã©ãŒãŒæŽ»æ§ã¯ããããšã©ããã§åçã§ãã£ãïŒBogdanffy et al., 1998ïŒã
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EURAR V34: METHYL ACETATE
5/25
4.1.2.2 æ¥æ§æ¯æ§
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çµå£æäžãçµç®æäžããã³åžå ¥æé²ã«ããæ¥æ§æ¯æ§ã¯ãã©ãããçšããè©Šéšã®çµæã§ã¯ã
äœããã®ã§ãã£ããã©ããã«ã€ããŠã¯ãçµå£æäžã«ãã LD50 㯠6,482 mg/kgïŒSmyth et al.,
1962ïŒãåžå ¥æé²ã® LC50ã¯>49 mg/L/4hïŒSmyth et al., 1962ïŒãçµç®æäžã§ã® LD50ã¯>2,000 mg/kg
ïŒHoechst AG, 1988aïŒãšå ±åãããŠãããããŠã¹ã® LC50ã¯> 24 mg/L/8hããã³ã® LC50ã¯> 30
mg/L/10h ãšå ±åãããŠãããäž¡åç©çš®ã§åæ§ã®åœ±é¿ãèªããããŠããïŒvon Oettingen, 1960ïŒã
ééå 5 å¹ã®ã©ããã®ç®èã«ãé ¢é žã¡ãã« 2,000 mg/kgïŒåªäœäžäœ¿çšïŒã 24 æééå¡å¡åžãã
ããçç¶ã¯èªããããªãã£ããæ»äº¡äŸã¯ãªãã14 æ¥éã®èŠ³å¯æéåŸã®åæ€ã§ããç°åžžã¯èª
ããããªãã£ãïŒHoechst AG, 1988bïŒãçµå£æäžãé ¢é žã¡ãã«èžæ°ãžã®åžå ¥æé²ã«ããã麻é
çç¶ãçæ£ãåŒåžå°é£ããã³ååãåŒãèµ·ããããåžå ¥æé²ã§ã¯ããã«ãçŒãäžæ°éã«åº
æ¿çç¶ãèªããããïŒvon Oettingen, 1960ïŒã
é ¢é žã¡ãã«ã®åžå ¥ã«ããã麻é äœçšãçŸãããããã®äœçšæç¶æéã¯çãã麻é äœçšã¯ã
ããŠã¹ã§ã¯34 mg/LããïŒvon Oettingen, 1960ïŒããã³ã§ã¯56 mg/Lããã¿ãããïŒvon Oettingen,
1960ïŒãããããåæã«ã¯åŒåžé害ãååããã³çæ£ãçŸããããšãããããã麻é äœçšã¯
äžæ§ã«åŸããããã®ã§ã¯ãªãããŸããæ·±ã麻é äœçšã¯éåžžã«åŸããã«ããã
ããã«ãé©åºŠãªç¯å²å ã§ããã°ãçæéã®é«æ¿åºŠæé²ã®æ¹ããé·æéã®äœæ¿åºŠæé²ããã
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å šåœ±é¿ããè±åŽããã«ã¯æ°æ¥ãå¿ èŠãšãããšèããããïŒvon Oettingen, 1960ïŒã
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é ¢é žã¡ãã«ã®èžæ°ã 45 åéå¶çºçã«åžå ¥ããäºäŸã§ã¯ãé床ã®é çãšé¡èãªåç ãèªãã
ãã6 æéã«ããã£ãŠæç¶ããïŒvon Oettingen, 1960ïŒããã以äžã®è©³çŽ°ããŒã¿ã¯åŸãããŠããª
ããé ¢é žã¡ãã«èžæ°ãžã®è·æ¥æé²ãåããŠãã 69 æ³ã®äœæ¥å¡ã®äºäŸã§ã¯ãç®ãŸããé çã
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ã®èŠåã倱ãããšãå埩çã«èµ·ãããèŠç¥çµã«äž¡åŽæ§å§çž®ãå·ŠçŒã®èŠéã«åºç¯ãªäžå¿æç¹ã
ããã³å³çŒã®èŠéã«æ±å¿æ§ççªãèªããããïŒvon Oettingen, 1960ïŒã
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EURAR V34: METHYL ACETATE
6/25
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EURAR V34: METHYL ACETATE
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EURAR V34: METHYL ACETATE
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EURAR V34: METHYL ACETATE
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EURAR V34: METHYL ACETATE
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EURAR V34: METHYL ACETATE
16/25
æéã®åµåµåŠçœ®åŸã«é¶åµã®æ°å®€ãŸãã¯åµé»å ã«æ³šå ¥ããå Žåã§ãããã¯ããªèã®çºçã«å¬
å¥åœ¢æ§åœ±é¿ã¯èªããããªãã£ããç±³åœæè¡æ å ±å±ïŒNTISïŒ, 1977 ããã®åŒçšãã
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Table 4.10 Summary of studies relevant to reproduction with methanol
Species Protocol Results
Rat (inhalation)
200 ppm/7 days (6 h/d) no effects on serum testosterone, LH, corticosterone (Cameron et al., 1984)
Rat (inhalation)
200 ppm/6 weeks (8 h/d, 5 d/week); 50,200, 800 ppm/ 13 weeks (20 h/d, 7d/week)
no effects on testosterone synthesis, testis weight up to and including 800 ppm: no effects on testis (Lee et al., 1991)
Rat (inhalation)
5,000 ppm for 1, 3, 6 hours no significant effects on serum LH, FSH, and testosterone (Cooper et al., 1992)
Mice (gavage)
1,000 mg/kg for 5 days no effects on sperm morphology (Ward et al., 1984)
Fertility studies
2-generation-study rat (inhalation)
10,100, 1,000 ppm (continuously) up to and including 1,000 ppm no effects on reproductive capacity and capability NOAEC (fertility): 1,000 ppm (NEDO, 1987)
Developmental toxicity studies
Rat (inhalation)
200, 1,000, 5,000 ppm g.d. 7-17 (continuously)
NOAEC (mat.tox.): 1,000 ppm NOAEC (dev.tox.): 1,000 ppm (NEDO, 1987)
Rat (inhalation)
5,000, 10,000 ppm g.d. 1-19 (7 h/d); 20,000 ppm g.d. 7-15 (7 h/d)
NOAEC (mat.tox.): 10,000 ppm NOAEC (dev.tox.): 5,000 ppm (Nelson et al., 1985; 1990)
Rat (inhalation)
15,000 ppm g.d. 7-19 (7 h/d) no significant changes in postnatal neurobehavioral and neurophysiological development (Stanton et al., 1995)
Mice (inhalation)
1,000, 2,000, 5,000, 7,500, 10,000, 15,000 ppm (7 h/d) g.d. 6-15
NOAEC (mat.tox.): 5,000 ppm NOAEC (dev.tox.): 1,000 ppm (Rogers et al., 1993)
Mice (inhalation)
10,000 ppm g.d. 6-15 (6 h/d), 5,000, 10,000, 15,000 ppm, g.d. 7-9 (6 h/d), 10,000, 15,000 ppm g.d. 9-11 (6h/d)
NOAEC (mat.tox.): 5,000 ppm LOAEC (dev.tox.): 5,000 ppm (Bolon et al., 1993 ; 1994)
Rat (gavage)
1,600, 2,400, 3,200 mg/kg/d g.d. 1-8
NOAEL (mat. tox.): 2,400 mg/kg/d NOAEL (dev.tox.): 3,200 mg/kg/d (Cummings, 1993)
Table 4.10 continued overleaf
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EURAR V34: METHYL ACETATE
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Table 4.10 continued Summary of studies relevant to reproduction with methanol
Species Protocol Results
Rat (gavage)
1.3, 2.6, 5.2 ml/kg g.d. 10
NOAEL (mat tox.): 2.6 ml/kg LOAEL (dev.tox.): 1.3 ml/kg (Youssef et al., 1991)
Rat (oral)
2% in drinking water (â 2,500 mg/kg/d) g.d. 15-17 or 17-19
no effects on the dams and on fetal development and postnatal growth, indications for behavioral abnormalities (Infurna and Weiss, 1986)
Mice (gavage)
2.2,000 mg/kg/d g.d. 6-15
Embryo-/ fetotoxic and teratogenic effects comparable to inhalatory exposure of 10,000 ppm (Rogers et al., 1993)
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EURAR V34: METHYL ACETATE
18/25
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äž 11 è ¹ã«çºçïŒãããã³ã»ãšãã©ãã¹ãŠã®éªšåãã©ã¡ãŒã¿ã®é 延ãªã©ãèªããããã
èªç¶ååš©ãããä»åç©ã®çåçã¯ãå¯Ÿç §çŸ€ãäœçšé矀㧠97ïœ99%ã§ãã£ãã®ã«å¯Ÿããé«çš
é矀ïŒ5,000 ppmïŒã§ã¯ 82%ã§ãããé«çšé矀ã§ã¯ãåºçåŸã®æ»äº¡çãææã«é«ãã£ããéåŒ
ãïŒ4 æ¥ç®ïŒåŸã¯ããããã®çŸ€ã§ãæ»äº¡ã¯èªããããªãã£ããåºçä»ã®åœ¢æ åŠççºéã«ãæã
ããªçžéã¯ã¿ãããªãã£ããåå°åå¿ãæ åæ§æ€æ»ãåŠç¿èœåããã³éåå調æ§ã«ã€ããŠ
ããåŠçœ®ã«ããå€åã¯èªããããªãã£ãã8 é±éœ¢ã§ã®åæ€ã§ã¯ãé«çšé矀ã®ä»åç©ã§ãçåŽ
æ§ã®ç²ç¶è ºå§çž®ã 16.5%ãšããé«çã§èŠãããããã®ç²ç¶è ºã®çåŽæ§ã®å€å㯠5,000 ppm 矀
ã®ä»åç©ã«ã®ã¿èªãããã12 è ¹äž 8 è ¹ã§ã¿ãããã8 é±éœ¢ã§åæ€ããä»åç©ã®èåšééã«
ã€ããŠã¯ãé«çšé矀ã§ããã€ãã®èåšã«å€åãèªãããããã1,000 ppm 矀ã®ä»åç©ã§ã¯ã
è³ééãå«ããŠãããã®èåšééã«ãå€åã¯èªããããªãã£ãã
以äžã®ããã«ããã®è©Šéšã®çµæå šäœãããã¡ã¿ããŒã«ãžã®é£ç¶åžå ¥æé²ã«ããæ¯äœæ¯æ§ã«
é¢ãã NOAEC 㯠1,000 ppmïŒ1,300 mg/m3ïŒã§ãããçºççºéæ¯æ§ã«é¢ãã NOAEC ã 1,000
ppmïŒ1,300 mg/m3ïŒã§ãããšå€æãããã
ããã«ãSprague-Dawley ã©ãããã 20,000ã10,000 ãªãã㯠5,000 ppm ã®ã¡ã¿ããŒã«ã«ãåŠ
åš 7ïœ15 æ¥ã®éïŒ1 æ¥ 7 æéïŒæé²ããåŠåš 20 æ¥ã«å± 殺ããè©Šéšãè¡ãããŠãããæ¯åç©ã«
察ããæ¯æ§ã®åŸŽåïŒåæ¥ã®æé²åŸã®ãããã«äžå®å®ãªæ©è¡ïŒã¯ãé«çšé矀ïŒ20,000 ppmïŒã®æ¯å
ç©ã«ãããŠã®ã¿èªãããããšå ±åãããŠããããã®åŠåš åç©ã«å¯Ÿããæé²ã§ã¯ãé»äœæ°ã
çåºæ°ãèä»ã®æ»äº¡çãŸãã¯èä»åžåçã«åœ±é¿ã¯èªããããªãã£ããèä»ã«é¢ããŠã¯ã10,000
ppm 矀ã«äœéã®ææãªæžå°ãã¿ããã20,000 ppm 矀ã§ã¯ãå èå¥åœ¢ïŒæ³å°¿åšç³»ïŒããã³éªšæ Œ
å¥åœ¢ïŒæ€éªšæ¬ æãé žèïŒãè³è±åºããã³è³ãã«ãã¢ã®çºççå¢å ãèªããããããã®è©Šéšãã
ã¯ãçºççºéãžã®åœ±é¿ã«é¢ãã NOAEC 㯠5,000 ppmïŒ6,500 mg/m3ïŒãšãããããªãããã®
æ¿åºŠã§ã®æé²æéäžã®ã¡ã¿ããŒã«ã®è¡äžæ¿åºŠïŒéåŠåš ã©ããã§æž¬å®ïŒã¯ã0.8ïœ2.4 mg/mL ãšå ±
åãããŠããïŒNelson et al., 1985, 1990ïŒã
CD-1 ããŠã¹ãçšããè©Šéšã§ã¯ã15,000ã10,000ã7,500ã5,000ã2,000 ãªãã㯠1,000 ppm ã®
ã¡ã¿ããŒã«ã«ãåŠåš 6ïœ15 æ¥ã®éïŒ1 æ¥ 7 æéïŒãæ¯åç©ãåžå ¥æé²ããããããã®çšéã§ãã
æé²åŸã®æ¯åç©ã«ã¯ãæãããªäžæ¯çç¶ã¯èªããããªãã£ãã7,500ã10,000 ããã³ 15,000
ppm 矀ã§ãããã 1 å¹ã®æ¯åç©ãæ»äº¡ããããçšéé¢é£æ§ã¯èªããããªãã£ãã5,000 ppm
ãŸã§ã®çŸ€ã®æ¯åç©ã«ã¯ãå€åã¯èªããããªãã£ããã¡ã¿ããŒã«æé²çŸ€ã®æ¯åç©ã®äœéå¢å
éã¯ãåŠåš æéãéããŠãå¯Ÿç §çŸ€ãšåçã§ãã£ãããšãããèè ã¯ãã¡ã¿ããŒã«æé²ã¯æ¯
åç©ã®äœéã«åœ±é¿ããªããšå ±åããŠããïŒè©³çŽ°ãªããŒã¿ã¯ç€ºãããŠãªãïŒãä»åç©ã®èŠ³å¯ã§
ã¯ãé žèã®çºçŸãçšéã«æ¯äŸããŠå¢å ãïŒ1 è ¹ãããã®å²åããå¯Ÿç §çŸ€ã§ã¯ 28.0%ã§ãã£ãã®
ã«å¯Ÿãã1,000ã2,000ã5,000 ããã³ 15,000 ppm 矀ã§ãããã 33.6ã49.6ã74.4 ããã³ 60.0%ïŒã
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EURAR V34: METHYL ACETATE
22/25
2,000 ppm 以äžã®çŸ€ã§çµ±èšåŠçã«ææã§ãã£ããçšéã«æ¯äŸããŠãå£èè£ïŒ1 è ¹ãããã®å²å
ããå¯Ÿç §çŸ€ã§ã¯ 0.21%ã§ãã£ãã®ã«å¯Ÿãã1,000ã2,000ã5,000ã7,500ã10,000 ããã³ 15,000 ppm
矀ã§ãããã 0.65ã0.17ã8.8ã46.6ã52.7 ããã³ 48.3%ïŒãããã³è³è±åºïŒ1 è ¹ãããã®å²åãã
å¯Ÿç §çŸ€ã§ã¯ 0%ã§ãã£ãã®ã«å¯Ÿãã1,000ã2,000ã5,000ã7,500ã10,000 ããã³ 15,000 ppm 矀ã§
ãããã 0ã0.88ã6.9ã6.8ã27.4 ããã³ 43.3%ïŒã®å¢å ãã¿ããã5,000 ppm 以äžã®çŸ€ã§çµ±èš
åŠçã«ææã§ãã£ããçåºåŸæ»äº¡çã¯ã7,500 ppm 以äžã®çŸ€ã§ãçšéã«æ¯äŸããŠå¢å ããã
10,000 ppm 以äžã®çŸ€ã§ã¯ãèä»ã®äœéã«ã¯åœ±é¿ã¯èªããããªãã£ãããã®è©Šéšããã¯ãçº
ççºéãžã®åœ±é¿ã«é¢ãã NOAEC 㯠1,000 ppmïŒ1,300 mg/m3ïŒã§ããããã®æ¿åºŠã¯ãæ¯åç©
ã«ãããã¡ã¿ããŒã«ã®è¡äžæ¿åºŠãšããŠã¯ 0.06ïœ0.13 mg/mL ã«çžåœããŠããïŒRogers et al.,
1993ïŒã
ã¡ã¿ããŒã«ã«ãã£ãŠèªçºãããç¥çµç®¡æ¬ æã«çç®ããè©ŠéšããCD-1 ããŠã¹ãçšããŠè¡ãã
ãŠãããã¡ã¿ããŒã«ãžã®åžå ¥æé²ïŒ1 æ¥ 6 æéïŒãã10,000 ppm ã®æ¿åºŠã§åŠåš 6ïœ15 æ¥ã®éã«ã
15,000ã10,000 ãªãã㯠5,000 ppm ã®æ¿åºŠã§æãç¥çµç³»ã®çºçã圱é¿ãåããããåŠåš 7ïœ9
æ¥ã®éã«ããŸãã¯ã15,000 ãªãã㯠10,000 ppm ã®æ¿åºŠã§åŠåš 9ïœ11 æ¥ã®éã«å®æœããã15,000
ppm ã®ã¡ã¿ããŒã«ã«æé²ããã矀ã«ãããŠãç¥çµåŠçãªæ¯äœæ¯æ§ããæé²ã®åæ¥ã2 æ¥ç®ã
ãã³ 3 æ¥ç®ã«ããããã 20ã10 ããã³ 5%ã®æ¯åç©ã«èªããããããã®çç¶ã¯ãéå倱調ã
å転è¡åãæé žãèªçºéåã®æžå°ãªã©ã§ãã£ãããã®æ¯åç©ã®çç¶ã¯ãæé²çµäºåŸ 12 æé
以å ã«å埩ããã5,000 ããã³ 10,000 ppm 矀ã§ã¯ãæãããªèšåºçç¶ã¯èªããããªãã£ãã
ã¡ã¿ããŒã«ã«æé²ãããåã®æ¯åç©ã®äœéã¯ãå šãŠã®çŸ€ã§åçã§ãã£ãããæé²ã«ãã£ãŠ
æžå°ãããåŠåš 6ïœ15 æ¥ã« 10,000 ppm ã®æé²ãåãã矀ã§ã¯ã41.7 ± 1.9 gïŒå¯Ÿç §çŸ€ã§ 45.4 ±
4.3 gïŒã§ãã£ãããŸã 15,000 ppm ã®æé²ãåãã矀ã§ã¯ãå¯Ÿç §çŸ€ïŒåŠåš 7ïœ9 æ¥ïŒã§ã¯ 51.2 ±
0.9 g ã§ãã£ãã®ã«å¯ŸããåŠåš 7 æ¥ç®ã®æé²åŸã§ 45.3 ± 2.0 gãåŠåš 7ïœ8 æ¥ã®æé²åŸã§ 46.1 ±
1.8 gãåŠåš 7ïœ9 æ¥ã®æé²åŸã§ 45.9 ± 1.8 g ã§ãã£ãããŸããã¡ã¿ããŒã«ãžã®æé²ã«ããã1
è ¹åœããã®åžåèã®æ°ãå¢å ããã10,000 ppm ã§åŠåš 6ïœ15 æ¥ã«æé²ãåãã矀ã§ã¯ 32.2%
ïŒå¯Ÿç §çŸ€ã§ 4.4%ïŒãåæ¿åºŠã§åŠåš 7ïœ9 æ¥ã«æé²ãåãã矀ã§ã¯ 13.4%ïŒå¯Ÿç §çŸ€ã§ 1.1%ïŒãšã
ãå¢å ã瀺ããã15,000 ppm ã§ã®æé²ãåãã矀ã§ã¯ãå¯Ÿç §çŸ€ïŒåŠåš 7ïœ9 æ¥ïŒã® 2.7%ã«å¯Ÿã
ãŠãåŠåš 7 æ¥ç®ã®æé²åŸã§ã¯ 38.6%ãåŠåš 7ïœ8 æ¥ã®æé²åŸã§ã¯ 41.9%ãåŠåš 7ïœ9 æ¥ã®æé²
åŸã§ã¯ 46.2%ãšããå¢å ã瀺ãããããã«ãåŠåš 17 æ¥ç®ã®èä»äœéã«ãæžå°ãã¿ãããã
10,000 ppm ã®å Žåã¯ãåŠåš 6ïœ15 æ¥ã«æé²ãåãã矀㧠0.81 ± 0.03 gïŒå¯Ÿç §çŸ€ã¯ 0.93 ± 0.02 gïŒ
ã§ãã£ãã15,000 ppm ã§ã®æé²ãåãã矀ã§ã¯ãå¯Ÿç §çŸ€ïŒåŠåš 7ïœ9 æ¥ïŒã§ã¯ 0.92 ± 0.05 g ã§
ãã£ãã®ã«å¯ŸããåŠåš 7ïœ8æ¥ç®ã®æé²åŸã§ 0.81 ± 0.02 gãåŠåš 7ïœ9æ¥ç®ã®æé²åŸã§ 0.82±0.02
g ã§ãã£ããä»åç©ã®æ€æ»ã§ã¯ã10,000 ppm ãè¶ ããæé²ãåãã矀ã§ãå èå¥åœ¢ïŒè çæ¡
匵ïŒããã³éªšæ Œå¥åœ¢ïŒå£èè£ãå°Ÿéšç°åžžïŒãã¿ããããè çã®ç©ºæŽåããæäœæ¿åºŠã® 5,000 ppm
矀ããèªããããïŒåŠåš 7ïœ9 æ¥ã« 5,000ã10,000 ããã³ 15,000 ppm ã§æé²ãåãã矀ã§ãåŠ
åš è ¹æ°ã§èŠããšãå¯Ÿç §çŸ€ã® 41%ã«å¯ŸããŠããããã 100ã90 ããã³ 75%ã«ãä»åç©æ°ã§èŠã
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EURAR V34: METHYL ACETATE
23/25
ãšãå¯Ÿç §çŸ€ã® 4.3%ã«å¯ŸããŠããããã 49.5ã31.2 ããã³ 44.9%ïŒãç¥çµç®¡æ¬ æïŒè³è±åºãªã©ïŒ
ãã10,000 ppm 以äžã®çŸ€ã§èªããããïŒåŠåš 7ïœ9 æ¥ã« 5,000ã10,000 ããã³ 15,000 ppm ã§æ
é²ãåãã矀ã§ãåŠåš è ¹æ°ã§èŠããšãå¯Ÿç §çŸ€ã® 0%ã«å¯ŸããŠã5,000ã10,000 ããã³ 15,000 ppm
矀ã§ããããã 0ã30 ããã³ 65%ãä»åç©æ°ã§èŠããšãå¯Ÿç §çŸ€ã® 0%ã«å¯ŸããŠããããã 0ã
3.6 ããã³ 14.7%ïŒã以äžããããã®è©Šéšããã¯ãååç©ã®çºççºéã«é¢ãã LOAEC ãšã
ãŠã5,000 ppmïŒ6,500 mg/m3ïŒãå°åºãããïŒBolon et al., 1993ïŒã
åŠåš 1ïœ8 æ¥ã®ã©ãããžã®åŒ·å¶çµå£æäžããè€æ°åç¬ç«è©Šè¡ããè©Šéšãè¡ãããŠãããåŠåš
9ã11 ããã³ 20 æ¥ã«è©äŸ¡ãå®æœãããããèãèä»ã®çºéãªãã³ã«æ°çä»ã®çåçã«ã€ã
ãŠã3,200 mg/kg ã®çšéãŸã§åœ±é¿ã¯èªããããªãã£ããæ¯åç©ã§ã¯ãåŠåš 9 æ¥ã®è©äŸ¡æã«ã
æé«çšé矀ã«ãããŠã®ã¿ãäœéå¢å éã«ææãªæžå°ãã¿ããããäžæ¹ãåŠåš 20 æ¥ã®è©äŸ¡æ
ã«ã¯ããããã®çŸ€ã§ãäœéå¢å éã«ææãªå€åã¯èªããããªãã£ããä»ã®èšåºçæ¯æ§åŸŽå
ã¯èªããããªãã£ããšå ±åãããŠããïŒCummings, 1993ïŒã
ã¡ã¿ããŒã«ããåŠåš 10 æ¥ã®ã©ããã«ã1.3ã2.6 ãªãã㯠5.2 mL/kg ã®çšéã§ååçµå£æäžã
ãè©Šéšãå®æœãããŠããã5.2 mL/kg 矀ã§ãæ¯äœæ¯æ§ïŒ10ïŒ ä»¥äžã®äœéæžå°ïŒãèªããããã
èä»ã«ãããŠã¯ãäœéã®æžå°ïŒ11ïœ21%ïŒãããã³ãçšéäŸåæ§ã®ç°åžžïŒåç粟巣ãçŒã®ç°åžžïŒ
ã®çºççå¢å ããããäœãçšéã§ãèªããããïŒ1.3ã2.6 ããã³ 5.2 mL/kg ã§ãããã 0.6ã
4.8 ããã³ 6.7%ïŒïŒYoussef et al., 1991ãèŠçŽã®ã¿ïŒã
ã¡ã¿ããŒã«ããåŠåš 15ïœ17 æ¥ãŸã㯠17ïœ19 æ¥ã®ã©ããã«é£²æ°ŽæäžïŒ2%溶液ïŒããè©Šéšãè¡
ãããŠãããçŽ 2,500 mg/kg/æ¥ã®çšéã«çžåœããããèä»ã®çºéãããã³åºçåŸã®æé·ã«åœ±
é¿ã¯èªããããªãã£ããããããåŠçœ®çŸ€ã®æ°çä»ã¯ãåºçåŸ 1 æ¥ã®æä¹³éå§ã«å¯Ÿç §çŸ€ãã
ãé·æéãèŠããåºçåŸ 10 æ¥ã«ã¯ããŒã ã±ãŒãžããã®å·£äœãææã®ç§»åã«é·ãæéãèŠã
ãïŒInfurna and Weiss, 1986ïŒã
ã¡ã¿ããŒã«ããåŠåš 6ïœ15 æ¥ã®ããŠã¹ã«ã4,000 mg/kg ã®çšéã§çµå£æäžããè©Šéšãè¡ãã
ãŠãããã¡ã¿ããŒã«ã¯ãèžçæ°Žã«æº¶è§£ïŒ12%, w/vïŒããŠã8 æãš 15 æã® 1 æ¥ 2 åããããã 2
g/kgãããªãã¡ 16 mL/kg æäžããããèããã³èä»ã«å¯Ÿããæ¯æ§ã«å ããŠå¬å¥åœ¢æ§ãèªã
ããããäŸãã°ãå£èè£ããå¯Ÿç §çŸ€ã§ã¯ 0%ã§ãã£ãã®ã«å¯ŸããåŠçœ®çŸ€ã§ã¯ 1 è ¹åœãã 43.5%
ã«èªããããããŸããè³è±åºããå¯Ÿç §çŸ€ã§ã¯ 0%ã§ãã£ãã®ã«å¯ŸããåŠçœ®çŸ€ã§ã¯ 1 è ¹åœãã
28.8%ã«èªãããããããã«ãæ¯åç©ã®äœéå¢å æå¶ãèªããããïŒåŠåš 6ã8ã10ã12ã15
ããã³ 17 æ¥ã®äœéããå¯Ÿç §çŸ€ã§ã¯ãããã 26.4ã29.8ã32.1ã36.1ã43.6 ããã³ 48.6 g ã§ã
ã£ãã®ã«å¯ŸããåŠçœ®çŸ€ã§ã¯ãããã 26.5ã29.9ã31.8ã35,3ã37.3 ããã³ 38.1 g ã§ãã£ãïŒã
ãã®çšéã§ã®ã¡ã¿ããŒã«ã®è¡äžæ¿åºŠã¯ããã 4 mg/mL ã§ãããããã¯åããããªé節ãªåœ±
é¿ãã¿ããã 10,000 ppm ã§ã®åžå ¥æé²ã®éã®è¡äžæ¿åºŠãšåçã§ãã£ãïŒRogers et al., 1993ïŒã
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EURAR V34: METHYL ACETATE
24/25
ã¡ã¿ããŒã«ãžã®ã©ããããã³ããŠã¹ã®æé²ã«ããçæ®ã»çºçæ¯æ§è©Šéšã®ãŸãšã
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ããã第 1 äžä»£ããã³ç¬¬ 2 äžä»£ã®çæ®èœåã®ãã©ã¡ãŒã¿ã«ã圱é¿ã¯èªããããªãã£ããF1
ããã³ F2 äžä»£ã®åºçåŸã®çºéã«ãããŠãããããªééå€åïŒè³ïŒãã1,000 ppm æé²çŸ€ã§ã¿
ãããããåºçåŸã®åœ¢æ çãªãã³ã«æ©èœççºéãšã®é¢é£æ§ã¯ã¿ãããªãã£ããã¡ã¿ããŒã«
ãé£ç¶åžå ¥ãããããã® 2 äžä»£æé²è©Šéšããã¯ãåèèœã«é¢ãã NOAEC ã¯ã1,000 ppmïŒ1,300
mg/m3ïŒãšå°åºãããã
ã©ãããçšããé£ç¶åžå ¥æé²ã«ããçºçæ¯æ§è©Šéšã§ã¯ã5,000 ppm 矀ã§ãä»åç©ã®çºçã»çº
éã«å¯Ÿãã圱é¿ïŒ1 è ¹ãããã®çåèä»æ°ãçååºçä»æ°ã®æžå°ãåŸæåžåèã®å¢å ãèä»äœ
éã®æžå°ãèå ã®å èããã³éªšæ Œç°åžžãåºçåŸæ»äº¡çã®äžæïŒããæ¯äœæ¯æ§ïŒäœéå¢å éã®æž
å°ïŒãšãšãã«èªããããããããã1 段äœãçšéïŒ1,000 ppmïŒã§ã¯ããã®ãããªåœ±é¿ã¯èªãã
ããªãã£ããã©ãããéæ¬ çã«æé²ããå ŽåïŒ1 æ¥ 7 æéïŒã§ã¯ã10,000 ppm ã§ãçºçãžã®åœ±
é¿ïŒèä»ã®å èããã³éªšæ Œç°åžžãèä»äœéã®æžå°ïŒãèªãããããã5,000 ppm ã§ã¯èªããã
ãªãã£ããã©ãããçšãããã®éæ¬ æé²è©Šéšããã¯ãçºçæ¯æ§ã«é¢ããNOAECã¯ã1,000 ppm
ïŒ1,300 mg/m3ïŒãšå°åºãããããã®å€ã¯ãããŠã¹çšããããã€ãã®è©Šéšã«ããæ¯æãããŠã
ãããããã®è©Šéšã§ã¯ã2,000 ppmïŒ1 æ¥ 7 æéæé²ïŒã§ãæ¯äœæ¯æ§ã¯ç€ºãããã«èä»ã§éªšæ Œ
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