Naphthene
C10H8
Molecular mass: 128.18
ICSC # 0667
CAS # 91-20-3
RTECS # QJ0525000
UN # 1334 (solid); 2304 (molten)
EC # 601-052-00-2
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Combustible.
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NO open flames.
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Powder, water spray, foam, carbon dioxide.
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Explosion
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Above 80°C explosive vapour/air mixtures may be formed.
Finely dispersed particles form explosive mixtures in air.
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Prevent deposition of dust; closed system, dust explosion-proof electrical equipment and lighting.
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Exposure
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PREVENT DISPERSION OF DUST!
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•Inhalation
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Headache.
Weakness.
Nausea.
Vomiting.
Sweating.
Confusion.
Jaundice. Dark urine.
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Ventilation (not if powder), local exhaust, or breathing protection.
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Fresh air, rest.
Refer for medical attention.
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•Skin
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MAY BE ABSORBED!
(Further see Inhalation).
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Protective gloves.
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Rinse skin with plenty of water or shower.
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•Eyes
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Safety spectacles.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Diarrhoea.
Convulsions.
Unconsciousness.
(Further see Inhalation).
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Do not eat, drink, or smoke during work.
Wash hands before eating.
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Rest.
Refer for medical attention.
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Spillage Disposal
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Storage
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Packaging & Labelling
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Personal protection:
filter respirator for organic gases and vapours.
Do NOT let this chemical enter the environment.
Sweep spilled substance into covered containers; if appropriate, moisten first to prevent dusting.
Carefully collect remainder,
then remove to safe place.
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Separated from
strong oxidants,
food and feedstuffs
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Store in an area without drain or sewer access.
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Do not transport with food and feedstuffs.
Marine pollutant.
Xn symbol
N symbol
R: 22-40-50/53
S: 2-36/37-46-60-61
UN Hazard Class: 4.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
WHITE
SOLID IN VARIOUS FORMS
, WITH CHARACTERISTIC ODOUR.
Physical Dangers:
Dust explosion possible if in powder or granular form, mixed with air.
Chemical Dangers:
On combustion, forms irritating and toxic gases.
Reacts
with
strong oxidants
.
Occupational Exposure Limits:
TLV: 10 ppm as TWA; 15 ppm as STEL; (skin); A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK: skin absorption (H);
Carcinogen category: 2; Germ cell mutagen group: 3B;
(DFG 2004).
OSHA PEL: TWA 10 ppm (50 mg/m3)
NIOSH REL: TWA 10 ppm (50 mg/m3) ST 15 ppm (75 mg/m3)
NIOSH IDLH: 250 ppm See: 91203
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Routes of Exposure:
The substance can be absorbed into the body
by inhalation,
through the skin
and
by ingestion.
Inhalation Risk:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C.
See Notes.
Effects of Short-Term Exposure:
The substance may cause effects on the
blood
, resulting in lesions of blood cells (haemolysis)
.
See Notes.
The effects may be delayed.
Exposure by ingestion may result in death.
Medical observation is indicated.
Effects of Long-Term or Repeated Exposure:
The substance may have effects on the
blood
, resulting in chronic haemolytic
anaemia.
The substance may have effects on the eyes
, resulting in the development of cataract.
This substance is possibly carcinogenic to humans.
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Physical
Properties
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Boiling point: 218°C
Sublimation slowly at room temperature
Melting point: 80°C
Density: 1.16
g/cm3
Solubility in water, g/100 ml at 25°C:
none
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Vapour pressure, Pa at 25°C: 11
Relative vapour density (air = 1): 4.42
Flash point:
80°C c.c.
Auto-ignition temperature: 540°C
Explosive limits, vol% in air: 0.9-5.9
Octanol/water partition coefficient as log Pow: 3.3
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Environmental
Data
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The substance is very toxic to aquatic organisms.
The substance may cause long-term effects in the aquatic environment.
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N O T E S
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Some individuals may be more sensitive to the effect of naphthalene on blood cells.
Transport Emergency Card: TEC (R)-41S1334 (solid); 41GF1-II+III (solid); 41S2304 (molten)
NFPA Code: H2; F2; R0;
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ADDITIONAL INFORMATION
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ICSC: 0667
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NAPHTHALENE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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