HI Minoru-san,

I’m reposting this to take out the confusing parts.

With reasonable certainty, I think this can be rendered as m-クロロ 酸化スチレン

The closest example that I could get is this:
詳細な説明 【発明の詳細な説明】 【0001】 【発明の属する技術 ...
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... 交換膜、リン酸を含浸させたポリベンズイミダゾール膜、ポリスチレンスルフォン酸膜、スルフォン酸化スチレン・ビニルベンゼン共重合体膜等を挙げることができる。 ...
www.aist.go.jp/aist-idea/cgi-bin/detail_data2.cgi?kind=1&se... - 16k - Cached - Similar pages



酸化スチレン is a set translation for structure like this:
http://www.brenda.uni-koeln.de/index.php4?page=information/a...

“m” no doubt should go with chloro, not with oxide.

My previous notes:

“m” here stands for “meso”… this means the chloro group (Cl) is added to the 3rd position on a benzene ring, which is part of the styrene structure in this case. See a picture here:

http://www.hokkochem.co.jp/chemical/p_struc/067.gif

The I suspect the so-called “m-Chlorostyrene Oxide” is in fact an epoxide (that is, m-chlorostyrene epoxide). The structural formula of it can be seen here:

http://www.fcd.kaneka.co.jp/products/e_b.html

If you take the epoxide (what sticks out from the benzene ring other than Cl) as position no.1, then Cl is also located on the 3rd position – again, the meso position (hence, “m”).

Other terms in nomenclature for benzene substitution groups:
p = para (2nd or 5th position)
o = ortho (4th position – directly opposite position no. 1)

The structure of styrene here (substitution group in position 1):
http://images.google.com/images?svnum=10&um=1&hl=en&q=styren...

FYI:

国際化学物質安全性カード(WHO/IPCS/ILO)
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酸化スチレン STYRENE OXIDE Phenylethylene oxide Phenyl oxirane Styrene epoxide Styryl oxide ... 国際化学物質安全性カード. 酸化スチレン, ICSC番号:1201 ...
www.nihs.go.jp/ICSC/icssj-c/icss1201c.html - 19k - Cached - Similar pages