Basic information
- Name:
1,5-Naphthalene diisocyanate
- CAS No.:
3173-72-6
- Molecular Structure:
- Formula:
- C12H6N2O2
- Molecular Weight:
- 210.20
- Synonyms:
- 1,5-Naphthalenediol,diisocyanate (5CI);Isocyanic acid, 1,5-naphthylene ester (6CI,8CI);1,5-Diisocyanatonaphthalene;1,5-NDI;1,5-Naphthyl diisocyanate;1,5-Naphthylene diisocyanate;NDI;NSC 240728;
- EINECS:
- 221-641-4
- Density:
- 1.21 g/cm3
- Melting Point:
- 130 °C
- Boiling Point:
- 314.7 °C at 760 mmHg
- Flash Point:
- 128.6 °C
- Solubility:
- soluable in water
- Appearance:
- White to light-yellow crystalline flakes
- Hazard Symbols:
Xn- Risk Codes:
- 20-36/37/38-42-52/53
- Safety Description:
- 26-28-38-45-61 Details
- Transport Information:
- UN 2206
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Chemistry
IUPAC Name: 1,5-Diisocyanatonaphthalene
Synonyms of 1,5-Naphthalene diisocyanate (CAS NO.3173-72-6): 1,5-Naphthylene di-isocyanate ; 1,5-Diisocyanatonaphthalene ; 1,5-Naphthyl diisocyanate ; 1,5-Naphthylene diisocyanate ; 4-13-00-00342 (Beilstein Handbook Reference) ; BRN 2212353 ; CCRIS 8920 ; EINECS 221-641-4 ; NSC 240728 ; Isocyanic acid, 1,5-naphthylene ester ; Naphthalene, 1,5-diisocyanato- ; 1,5-Naphthalene diisocyanate [Diisocyanates]
CAS NO: 3173-72-6
Classification Code: Tumor data
Molecular Formula of 1,5-Naphthalene diisocyanate (CAS NO.3173-72-6): C12H6N2O2
Molecular Weight: 210.1882
Molecular Structure:
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Melting Point: 130°C
Polar Surface Area: 58.86 Å2
Index of Refraction: 1.618
Molar Refractivity: 60.56 cm3
Molar Volume: 172.7 cm3
Surface Tension: 49.8 dyne/cm
Density: 1.21 g/cm3
Flash Point: 128.6 °C
Enthalpy of Vaporization: 55.59 kJ/mol
Boiling Point: 314.7 °C at 760 mmHg
Vapour Pressure: 0.000459 mmHg at 25°C
Uses
1,5-Naphthalene diisocyanate (CAS NO.3173-72-6) is used as intermediate.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rat | LC50 | inhalation | 270mg/m3/4H (270mg/m3) | LUNGS, THORAX, OR RESPIRATION: DYSPNEA LUNGS, THORAX, OR RESPIRATION: CYANOSIS | National Technical Information Service. Vol. OTS0572846, |
Consensus Reports
IARC Cancer Review: Group 3 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory.
Safety Profile
A powerful allergen. An irritant. Questionable carcinogen. When heated to decomposition it emits toxic fumes of NOx. See also ISOCYANATES.
Hazard Codes of 1,5-Naphthalene diisocyanate (CAS NO.3173-72-6): 
Xn
Risk Statements: 20-36/37/38-42-52/53
R20: Harmful by inhalation.
R36/37/38: Irritating to eyes, respiratory system and skin.
R42: May cause sensitization by inhalation.
R52/53: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Safety Statements: 26-28-38-45-61
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S28: After contact with skin, wash immediately with plenty of soap-suds.
S38: In case of insufficient ventilation, wear suitable respiratory equipment.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S61: Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: 2206
RTECS: NQ9600000
HazardClass: 6.1(b)
PackingGroup: III
Standards and Recommendations
DFG MAK: 0.01 ppm (0.087 mg/m3)
Specification
It should be keep away from heat, sparks, and flame. keep away from sources of ignition. and stored in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.
