You should use the one from the w3c.

HTMLCodeDescription
nbsp no-break space = non-breaking space, U+00A0 ISOnum
iexcl¡inverted exclamation mark, U+00A1 ISOnum
cent¢cent sign, U+00A2 ISOnum
pound£pound sign, U+00A3 ISOnum
curren¤currency sign, U+00A4 ISOnum
yen¥yen sign = yuan sign, U+00A5 ISOnum
brvbar¦broken bar = broken vertical bar, U+00A6 ISOnum
sect§section sign, U+00A7 ISOnum
uml¨diaeresis = spacing diaeresis, U+00A8 ISOdia
copy©copyright sign, U+00A9 ISOnum
ordfªfeminine ordinal indicator, U+00AA ISOnum
laquo«left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum
not¬not sign, U+00AC ISOnum
shy­soft hyphen = discretionary hyphen, U+00AD ISOnum
reg®registered sign = registered trade mark sign, U+00AE ISOnum
macr¯macron = spacing macron = overline = APL overbar, U+00AF ISOdia
deg °degree sign, U+00B0 ISOnum
plusmn ±plus-minus sign = plus-or-minus sign, U+00B1 ISOnum
sup2 ²superscript two = superscript digit two = squared, U+00B2 ISOnum
sup3 ³superscript three = superscript digit three = cubed, U+00B3 ISOnum
acute ´acute accent = spacing acute, U+00B4 ISOdia
micro µmicro sign, U+00B5 ISOnum
para pilcrow sign = paragraph sign, U+00B6 ISOnum
middot ·middle dot = Georgian comma = Greek middle dot, U+00B7 ISOnum
cedil ¸cedilla = spacing cedilla, U+00B8 ISOdia
sup1 ¹superscript one = superscript digit one, U+00B9 ISOnum
ordm ºmasculine ordinal indicator, U+00BA ISOnum
raquo »right-pointing double angle quotation mark = right pointing guillemet, U+00BB ISOnum
frac14 ¼vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum
frac12 ½vulgar fraction one half = fraction one half, U+00BD ISOnum
frac34 ¾vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum
iquest ¿inverted question mark = turned question mark, U+00BF ISOnum
Agrave Àlatin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1
Aacute Álatin capital letter A with acute, U+00C1 ISOlat1
Acirc Âlatin capital letter A with circumflex, U+00C2 ISOlat1
Atilde Ãlatin capital letter A with tilde, U+00C3 ISOlat1
Auml Älatin capital letter A with diaeresis, U+00C4 ISOlat1
Aring Ålatin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1
AElig Ælatin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1
Ccedil Çlatin capital letter C with cedilla, U+00C7 ISOlat1
Egrave Èlatin capital letter E with grave, U+00C8 ISOlat1
Eacute Élatin capital letter E with acute, U+00C9 ISOlat1
Ecirc Êlatin capital letter E with circumflex, U+00CA ISOlat1
Euml Ëlatin capital letter E with diaeresis, U+00CB ISOlat1
Igrave Ìlatin capital letter I with grave, U+00CC ISOlat1
Iacute Ílatin capital letter I with acute, U+00CD ISOlat1
Icirc Îlatin capital letter I with circumflex, U+00CE ISOlat1
Iuml Ïlatin capital letter I with diaeresis, U+00CF ISOlat1
ETH Ðlatin capital letter ETH, U+00D0 ISOlat1
Ntilde Ñlatin capital letter N with tilde, U+00D1 ISOlat1
Ograve Òlatin capital letter O with grave, U+00D2 ISOlat1
Oacute Ólatin capital letter O with acute, U+00D3 ISOlat1
Ocirc Ôlatin capital letter O with circumflex, U+00D4 ISOlat1
Otilde Õlatin capital letter O with tilde, U+00D5 ISOlat1
Ouml Ölatin capital letter O with diaeresis, U+00D6 ISOlat1
times ×multiplication sign, U+00D7 ISOnum
Oslash Ølatin capital letter O with stroke = latin capital letter O slash, U+00D8 ISOlat1
Ugrave Ùlatin capital letter U with grave, U+00D9 ISOlat1
Uacute Úlatin capital letter U with acute, U+00DA ISOlat1
Ucirc Ûlatin capital letter U with circumflex, U+00DB ISOlat1
Uuml Ülatin capital letter U with diaeresis, U+00DC ISOlat1
Yacute Ýlatin capital letter Y with acute, U+00DD ISOlat1
THORN Þlatin capital letter THORN, U+00DE ISOlat1
szlig ßlatin small letter sharp s = ess-zed, U+00DF ISOlat1
agrave àlatin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1
aacute álatin small letter a with acute, U+00E1 ISOlat1
acirc âlatin small letter a with circumflex, U+00E2 ISOlat1
atilde ãlatin small letter a with tilde, U+00E3 ISOlat1
auml älatin small letter a with diaeresis, U+00E4 ISOlat1
aring ålatin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1
aelig ælatin small letter ae = latin small ligature ae, U+00E6 ISOlat1
ccedil çlatin small letter c with cedilla, U+00E7 ISOlat1
egrave èlatin small letter e with grave, U+00E8 ISOlat1
eacute élatin small letter e with acute, U+00E9 ISOlat1
ecirc êlatin small letter e with circumflex, U+00EA ISOlat1
euml ëlatin small letter e with diaeresis, U+00EB ISOlat1
igrave ìlatin small letter i with grave, U+00EC ISOlat1
iacute ílatin small letter i with acute, U+00ED ISOlat1
icirc îlatin small letter i with circumflex, U+00EE ISOlat1
iuml ïlatin small letter i with diaeresis, U+00EF ISOlat1
eth ðlatin small letter eth, U+00F0 ISOlat1
ntilde ñlatin small letter n with tilde, U+00F1 ISOlat1
ograve òlatin small letter o with grave, U+00F2 ISOlat1
oacute ólatin small letter o with acute, U+00F3 ISOlat1
ocirc ôlatin small letter o with circumflex, U+00F4 ISOlat1
otilde õlatin small letter o with tilde, U+00F5 ISOlat1
ouml ölatin small letter o with diaeresis, U+00F6 ISOlat1
divide ÷division sign, U+00F7 ISOnum
oslash ølatin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1
ugrave ùlatin small letter u with grave, U+00F9 ISOlat1
uacute úlatin small letter u with acute, U+00FA ISOlat1
ucirc ûlatin small letter u with circumflex, U+00FB ISOlat1
uuml ülatin small letter u with diaeresis, U+00FC ISOlat1
yacute ýlatin small letter y with acute, U+00FD ISOlat1
thorn þlatin small letter thorn, U+00FE ISOlat1
yuml ÿlatin small letter y with diaeresis, U+00FF ISOlat1
fnof ƒlatin small f with hook = function = florin, U+0192 ISOtech
Alpha Αgreek capital letter alpha, U+0391
Beta Βgreek capital letter beta, U+0392
Gamma Γgreek capital letter gamma, U+0393 ISOgrk3
Delta Δgreek capital letter delta, U+0394 ISOgrk3
Epsilon Εgreek capital letter epsilon, U+0395
Zeta Ζgreek capital letter zeta, U+0396
Eta Ηgreek capital letter eta, U+0397
Theta Θgreek capital letter theta, U+0398 ISOgrk3
Iota Ιgreek capital letter iota, U+0399
Kappa Κgreek capital letter kappa, U+039A
Lambda Λgreek capital letter lambda, U+039B ISOgrk3
Mu Μgreek capital letter mu, U+039C
Nu Νgreek capital letter nu, U+039D
Xi Ξgreek capital letter xi, U+039E ISOgrk3
Omicron Οgreek capital letter omicron, U+039F
Pi Πgreek capital letter pi, U+03A0 ISOgrk3
Rho Ρgreek capital letter rho, U+03A1
Sigma Σgreek capital letter sigma, U+03A3 ISOgrk3
Tau Τgreek capital letter tau, U+03A4
Upsilon Υgreek capital letter upsilon, U+03A5 ISOgrk3
Phi Φgreek capital letter phi, U+03A6 ISOgrk3
Chi Χgreek capital letter chi, U+03A7
Psi Ψgreek capital letter psi, U+03A8 ISOgrk3
Omega Ωgreek capital letter omega, U+03A9 ISOgrk3
alpha αgreek small letter alpha, U+03B1 ISOgrk3
beta βgreek small letter beta, U+03B2 ISOgrk3
gamma γgreek small letter gamma, U+03B3 ISOgrk3
delta δgreek small letter delta, U+03B4 ISOgrk3
epsilon εgreek small letter epsilon, U+03B5 ISOgrk3
zeta ζgreek small letter zeta, U+03B6 ISOgrk3
eta ηgreek small letter eta, U+03B7 ISOgrk3
theta θgreek small letter theta, U+03B8 ISOgrk3
iota ιgreek small letter iota, U+03B9 ISOgrk3
kappa κgreek small letter kappa, U+03BA ISOgrk3
lambda λgreek small letter lambda, U+03BB ISOgrk3
mu μgreek small letter mu, U+03BC ISOgrk3
nu νgreek small letter nu, U+03BD ISOgrk3
xi ξgreek small letter xi, U+03BE ISOgrk3
omicron οgreek small letter omicron, U+03BF NEW
pi πgreek small letter pi, U+03C0 ISOgrk3
rho ρgreek small letter rho, U+03C1 ISOgrk3
sigmaf ςgreek small letter final sigma, U+03C2 ISOgrk3
sigma σgreek small letter sigma, U+03C3 ISOgrk3
tau τgreek small letter tau, U+03C4 ISOgrk3
upsilon υgreek small letter upsilon, U+03C5 ISOgrk3
phi φgreek small letter phi, U+03C6 ISOgrk3
chi χgreek small letter chi, U+03C7 ISOgrk3
psi ψgreek small letter psi, U+03C8 ISOgrk3
omega ωgreek small letter omega, U+03C9 ISOgrk3
thetasym ϑgreek small letter theta symbol, U+03D1 NEW
upsih ϒgreek upsilon with hook symbol, U+03D2 NEW
piv ϖgreek pi symbol, U+03D6 ISOgrk3
bull bullet = black small circle, U+2022 ISOpub
hellip horizontal ellipsis = three dot leader, U+2026 ISOpub
prime prime = minutes = feet, U+2032 ISOtech
Prime double prime = seconds = inches, U+2033 ISOtech
oline overline = spacing overscore, U+203E NEW
frasl fraction slash, U+2044 NEW
weierp script capital P = power set = Weierstrass p, U+2118 ISOamso
image blackletter capital I = imaginary part, U+2111 ISOamso
real blackletter capital R = real part symbol, U+211C ISOamso
trade trade mark sign, U+2122 ISOnum
alefsym alef symbol = first transfinite cardinal, U+2135 NEW
larr leftwards arrow, U+2190 ISOnum
uarr upwards arrow, U+2191 ISOnum
rarr rightwards arrow, U+2192 ISOnum
darr downwards arrow, U+2193 ISOnum
harr left right arrow, U+2194 ISOamsa
crarr downwards arrow with corner leftwards = carriage return, U+21B5 NEW
lArr leftwards double arrow, U+21D0 ISOtech
uArr upwards double arrow, U+21D1 ISOamsa
rArr rightwards double arrow, U+21D2 ISOtech
dArr downwards double arrow, U+21D3 ISOamsa
hArr left right double arrow, U+21D4 ISOamsa
forall for all, U+2200 ISOtech
part partial differential, U+2202 ISOtech
exist there exists, U+2203 ISOtech
empty empty set = null set = diameter, U+2205 ISOamso
nabla nabla = backward difference, U+2207 ISOtech
isin element of, U+2208 ISOtech
notin not an element of, U+2209 ISOtech
ni contains as member, U+220B ISOtech
prod n-ary product = product sign, U+220F ISOamsb
sum n-ary sumation, U+2211 ISOamsb
minus minus sign, U+2212 ISOtech
lowast asterisk operator, U+2217 ISOtech
radic square root = radical sign, U+221A ISOtech
prop proportional to, U+221D ISOtech
infin infinity, U+221E ISOtech
ang angle, U+2220 ISOamso
and logical and = wedge, U+2227 ISOtech
or logical or = vee, U+2228 ISOtech
cap intersection = cap, U+2229 ISOtech
cup union = cup, U+222A ISOtech
int integral, U+222B ISOtech
there4 therefore, U+2234 ISOtech
sim tilde operator = varies with = similar to, U+223C ISOtech
cong approximately equal to, U+2245 ISOtech
asymp almost equal to = asymptotic to, U+2248 ISOamsr
ne not equal to, U+2260 ISOtech
equiv identical to, U+2261 ISOtech
le less-than or equal to, U+2264 ISOtech
ge greater-than or equal to, U+2265 ISOtech
sub subset of, U+2282 ISOtech
sup superset of, U+2283 ISOtech
nsub not a subset of, U+2284 ISOamsn
sube subset of or equal to, U+2286 ISOtech
supe superset of or equal to, U+2287 ISOtech
oplus circled plus = direct sum, U+2295 ISOamsb
otimes circled times = vector product, U+2297 ISOamsb
perp up tack = orthogonal to = perpendicular, U+22A5 ISOtech
sdot dot operator, U+22C5 ISOamsb
lceil left ceiling = apl upstile, U+2308 ISOamsc
rceil right ceiling, U+2309 ISOamsc
lfloor left floor = apl downstile, U+230A ISOamsc
rfloor right floor, U+230B ISOamsc
lang left-pointing angle bracket = bra, U+2329 ISOtech
rang right-pointing angle bracket = ket, U+232A ISOtech
lozlozenge, U+25CA ISOpub
spadesblack spade suit, U+2660 ISOpub
clubsblack club suit = shamrock,U+2663 ISOpub
heartsblack heart suit = valentine,U+2665 ISOpub
diamsblack diamond suit, U+2666 ISOpub
quot"quotation mark = APL quote, U+0022 ISOnum
amp&ampersand, U+0026 ISOnum
lt<less-than sign, U+003C ISOnum
gt>greater-than sign, U+003E ISOnum
OEligŒlatin capital ligature OE,U+0152 ISOlat2
oelig œlatin small ligature oe, U+0153 ISOlat2
Scaron Šlatin capital letter S with caron,U+0160 ISOlat2
scaron šlatin small letter s with caron,U+0161 ISOlat2
Yuml Ÿlatin capital letter Y with diaeresis,U+0178 ISOlat2
circ ˆmodifier letter circumflex accent,U+02C6 ISOpub
tilde ˜small tilde, U+02DC ISOdia
ensp en space, U+2002 ISOpub
emsp em space, U+2003 ISOpub
thinsp thin space, U+2009 ISOpub
zwnj zero width non-joiner, U+200C NEW RFC 2070
zwj zero width joiner, U+200D NEW RFC 2070
lrm left-to-right mark, U+200E NEW RFC 2070
rlm right-to-left mark, U+200F NEW RFC 2070
ndash en dash, U+2013 ISOpub
mdash em dash, U+2014 ISOpub
lsquo left single quotation mark, U+2018 ISOnum
rsquo right single quotation mark, U+2019 ISOnum
sbquo single low-9 quotation mark, U+201A NEW
ldquo left double quotation mark, U+201C ISOnum
rdquo right double quotation mark, U+201D ISOnum
bdquo double low-9 quotation mark, U+201E NEW
dagger dagger, U+2020 ISOpub
Dagger double dagger, U+2021 ISOpub
permil per mille sign, U+2030 ISOtech
lsaquo single left-pointing angle quotation mark, U+2039 ISO proposed lsaquo is proposed but not yet ISO standardized
rsaquo single right-pointing angle quotation mark, U+203A ISO proposed rsaquo is proposed but not yet ISO standardized
euro euro sign, U+20AC NEW

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