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200 OK - cse2.com
HTTP Status: 200
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GET / HTTP/1.1
Host: cse2.com
Accept: */*
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
	<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1">
	<meta http-equiv="content-language" content="en">
	<TITLE>Carbon Diselenide CSe2</TITLE>
	
	<META NAME="CLASSIFICATION" CONTENT="CSe2">
	<META NAME="KEYWORDS" CONTENT="carbon, diselenide, selenide, prices, methanediselone, carbon diselenide, price, chemicals">
</HEAD>
<BODY>
<P ALIGN=CENTER><IMG SRC="se=c=se.gif" NAME="Grafika1" ALIGN=BOTTOM WIDTH=516 HEIGHT=93 BORDER=0></P>
<P ALIGN=CENTER><FONT COLOR="#ff6633"><FONT FACE="Arial, sans-serif"><B>International
Chemical Service about Carbon Diselenide
(Methanediselone)<BR>Se=C=Se<BR>CSe<SUB>2</SUB></B></FONT></FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Chemical
properties:</FONT></B><BR><I><FONT COLOR="#b80047">molecular mass:</FONT></I>
169.93 g/mol<BR><I><FONT COLOR="#b80047">melting point:</FONT></I>
-45 &deg;C (lit.)<BR><FONT COLOR="#b80047">boiling point:</FONT> 125-126
&deg;C (lit.)<BR><I><FONT COLOR="#b80047">stability:</FONT></I> decomposes
slowly about 1% per month at -30 &deg;C<BR><I><FONT COLOR="#b80047">heat
of formation:</FONT></I> 34 kcal/mol (lit.)<BR><I><FONT COLOR="#b80047">solubility:</FONT></I>
good in organic solvents, insoluble in water<BR><I><FONT COLOR="#b80047">react
with:</FONT></I> bases and nucleophiles<BR><I><FONT COLOR="#b80047">other:</FONT></I>
light sensitive, strong unpleasant odor<BR><I><FONT COLOR="#b80047">main
use:</FONT></I> synthesis of organic conductors and
superconductors<BR>such as selenium analogs of <a href="https://www.tetrathiafulvalene.com">tetrathiafulvalene
(TTF)</a> derivatives<BR>- tetraselenafulvalene</FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Physical
properties:</FONT></B><BR><I><FONT COLOR="#b80047">appearance:</FONT>
</I>yellow-orange liquide<BR><I><FONT COLOR="#b80047">normal density:</FONT></I>
2.66 g/ml (lit.)<BR><I><FONT COLOR="#b80047">n<SUB>D</SUB>:</FONT></I> 1.845 (lit.)</FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Biological
properties:</FONT></B><BR><I><FONT COLOR="#b80047">toxicity:</FONT></I><SPAN STYLE="font-style: normal">
probably toxic as other selenium compounds,<BR>may by dangerous
because of possibility of easy membrane transport,<BR>also dangerous
by inhalation (high vapour pressure)</SPAN></FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Systematical
information:</FONT></B><BR><FONT COLOR="#b80047"><I>name(s):</I>
</FONT>carbon diselenide, carbon selenide;
methanediselone;<BR>carbon(IV) selenide; 1,3-diselenapropadiene;
1,3-diselenaallene; selenium carbide <BR><I><FONT COLOR="#b80047">CAS No.:</FONT></I>
506-80-9<BR><I><FONT COLOR="#b80047">Merck (12th Ed.):</FONT></I>
1858<BR><I><FONT COLOR="#b80047">CRCH No.:</FONT></I> QS.500091</FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Aprox. prices:</FONT></B><BR><I><FONT COLOR="#b80047">

1) carbon diselenide  +98% (GC-MS):</FONT></I><BR>
1 g - 5984.00 EUR<br>
5 g - 9415.00 EUR<br>
10 g - 12,887.00 EUR<br>
25 g - 19,710.00 EUR<br>
100 g - 31,045.00 EUR<BR>
250 g - 40,155.00 EUR<br>
500 g - 58,340.00 EUR<br>
</FONT><FONT FACE="Arial, sans-serif"><I><FONT COLOR="#b80047">
<br>
2)carbon diselenide +99% (GC-MS):</FONT><BR></I><SPAN STYLE="font-style: normal">add 15% to
above prices
<br><br>
<FONT COLOR="#b80047">
3) carbon diselenide (+98 or +99%), ~5% solution in solvent</font><br>
prices are based on neat CSe2 prices and additional fee: <br>
1 - 10 g of CSe2 - 257.00 EUR <br>
11 - 50 g of CSe2 - 284.00 EUR<br>
51 - 125 g of CSe2 - 372.00 EUR<br>
126 - 500 g of CSe2 - 458.00 EUR<br>
solvents: diethyl ether, THF, NMP, benzene, cyclohexane, dioxane, dichloromethane, tetrachloroethylene, pentane<br>
available containers: orange glass bottles 30 ml, 100 ml, 250 ml, 500 ml, 1000 ml, 2500 ml with PTFE seal<br>
solutions are more stable than neat product<br><br>

<BR>Prices denominated in other currencies on request (USD, PLN, GBP, CHF, AUD, CAD, JPY)
</SPAN></FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Supliers:</FONT></B><BR><A HREF="https://www.chemicals.pl/">CRCH Chemicals</A>
(Poland)</FONT></P>
<P ALIGN=CENTER><FONT FACE="Arial, sans-serif"><B><FONT COLOR="#0047ff">Aliases:</FONT></B><BR><A HREF="https://www.carbon.diselenide.com/">Carbon Diselenide Page</A><BR><A HREF="http://www.carbon-diselenide.chem.pl/">Produkt: Diselenek wegla</A>
(Polish)</FONT>
<br><br>
<font color=#aaaaaa>______________________________________<br>
Copyright &#169; <a href="https://www.crch.pl" style="color:#aaaaaa; text-decoration:none;">CRCH Ltd.</a> 2004-2025 Poland</font>

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