91-20-3 C10H8 Naphthalene CAS NO.91-20-3

naphthalene basic information

product name:	naphthalene
synonyms:	'lgc' (2402);'lgc' (2603);1-naphthalene;tar camphor;napthalene;napthalin;naphthene;naphthalene
cas:	91-20-3
mf:	c10h8
mw:	128.17
einecs:	202-049-5
product categories:	intermediates of dyes and pigments;naphthalene;organoborons;highly purified reagents;other categories;zone refined products;analytical chemistry;standard solution of volatile organic compounds for water & soil analysis;standard solutions (voc);chemistry;naphthalenes;analytical standards;aromaticsvolatiles/ semivolatiles;volatiles/ semivolatiles;arenes;building blocks;organic building blocks;alpha sort;chemical class;fumigantsvolatiles/ semivolatiles;hydrocarbons;insecticides;n;na - nianalytical standards;naphthaleneschemical class;neats;n-oalphabetic;pesticides;pah
mol file:	91-20-3.mol

naphthalene chemical properties

mp	80-82 °c(lit.)
bp	218 °c(lit.)
density	0.99
vapor density	4.4 (vs air)
vapor pressure	0.03 mm hg ( 25 °c)
refractive index	1.5821
fp	174 °f
storage temp.	approx 4°c
water solubility	30 mg/l (25 ºc)
merck	14,6370
brn	1421310
cas database reference	91-20-3(cas database reference)
nist chemistry reference	naphthalene(91-20-3)
epa substance registry system	naphthalene(91-20-3)

safety information

hazard codes	xn,n,f,t
risk statements	22-40-50/53-67-65-38-11-39/23/24/25-23/24/25-52/53-20
safety statements	36/37-46-60-61-62-45-16-7-33-25-9
ridadr	un 1334 4.1/pg 3
wgk germany	3
rtecs	qj0525000
hazardclass	4.1
packinggroup	iii
hs code	29029010
hazardous substances data	91-20-3(hazardous substances data)

msds information

naphthalene usage and synthesis

chemical properties	white to almost white crystals, crystalline flakes
usage	naphthalene was used in liquid-phase exfoliation of graphite in organic solvents for the production of graphene sheets. it was used in preparation of carbon-coated si 70 sn 30 nanoparticles. it was used as fluorescent probe to study the aggregation behavior of sodium cholate. it was used to investigate influence of added short chain linear and branched alcohols on the binding of 1:1 complex of naphthalene and β-cyclodextrin.
air & water reactions	highly flammable. insoluble in water.
reactivity profile	vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as naphthalene, and strong oxidizing agents. they can react exothermically with bases and with diazo compounds. substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the friedel-crafts reaction. naphthalene, camphor, glycerol, or turpentine will react violently with chromic anhydride [haz. chem. data 1967. p 68]. friedel-crafts acylation of naphthalene using benzoyl chloride, catalyzed by alcl3, must be conducted above the melting point of the mixture, or the reaction may be violent [clar, e. et al., tetrahedron, 1974, 30, 3296].
health hazard	fire may produce irritating and/or toxic gases. contact may cause burns to skin and eyes. contact with molten substance may cause severe burns to skin and eyes. runoff from fire control may cause pollution.
fire hazard	flammable/combustible material. may be ignited by friction, heat, sparks or flames. some may burn rapidly with flare burning effect. powders, dusts, shavings, borings, turnings or cuttings may explode or burn with explosive violence. substance may be transported in a molten form at a temperature that may be above its flash point. may re-ignite after fire is extinguished.

naphthalene preparation products and raw materials

raw materials

petroleum ether-->biphenyl-->kaolin-->coal tar-->coal tar-->indene-->ethylene-->1,2,3,4-tetrahydronaphthalene-->dodecylbenzene-->technical naphthalene-->phenol oil

preparation products

phthalic anhydride-->1-naphthol-->2-naphthol-->benzoic acid-->1-aminonaphthalene-->glycerite-->linolenic acid-->2-amino-4,8-naphthalenedisulfonic acid-->dibenzanthrone-->naphthenic acid-->peri acid-->1-naphthalene acetic acid-->1'-acetonaphthone-->1-aminonaphthalene-6-sulfonic acid-->5-amino-1-naphthalenesulfonic acid-->vat yellow 2-->1,4,5,8-naphthalenetetracarboxylic acid-->2-methylbutane-->1-iodonaphthalene-->butylnaphthalenesulfonic acid sodium salt-->1,5-naphthalenedisulfonic acid-->vat yellow 4-->vat brown 5-->slushing agent,high efficiency-->sec-butylamine-->barium dinonylnaphthalenesulfonate-->slushing agent-->1,5-dihydroxy naphthalene-->synthetic fiber oil qdc-201-->disodium methylenebisnaphthalenesulphonate-->1-nitronaphthalene-->sodium poly[(naphthaleneformaldehyde)sulfonate]-->2,6-dimethylnaphthalene-->dispersing agent dn-->dispersing agent cnf-->1-naphthol-5-sulfonic acid

hennan sunlake enterprise corporation is located in henan province , the central plain of china , which enjoys favorable geogeaphical position and convenient transportion, the com[any was established in june. 1998 , until now having more than 18 years experience in manufacturing & exporting chemical raw material .

sunlake is a professional manufacturer engaged in producing and selling chemicals,including organic & inorganic chemicals , pigments & dyestuffs , water treatment chemicals , food & feed additives and others . these products have been being well exported to europe , southeast asia , the middle east , africa , south america and some other countries and areas.

we sincerely welcome foreign friends to visit our plant for cooperation. with the idea of "quality first,credit priority, excellent service", we are highly acknowledged by customers for good quality and competitive price. more importantly , the company has a strong r & d team, who are professional engineers and scholars with ph. d. .so we are confident to serve you better with our high - quality products and professional team.

we are taking great efforts to provide our customers with demanded goods and professional services, and continuously improve our core ability of competition and get the momentum for sustainable development, and finally make us being a reliable and professional wupplier in international market. we welcome any serious inquiries from all customers of the world, and sincerely hope to cooperate with you for a brilliant future!