Naphthylen-1,5-diisocyanat

Bezeichnung:Naphthylen-1,5-diisocyanat

CAS-Nr3173-72-6

Englisch Name:1,5-Naphthalene diisocyanate

CBNumberCB1715235

SummenformelC12H6N2O2

Molgewicht210.19

MOL-Datei3173-72-6.mol

Synonyma

1,5-Naphthylendiisocyanat

Naphthylen-1,5-diisocyanat

1,5-Diisocyanatonaphthalin

Naphthylen-1,5-diisocyanat physikalisch-chemischer Eigenschaften

Schmelzpunkt	130°C
Siedepunkt	244°C (100 torr)
Dichte	1.45
Dampfdruck	0.001Pa at 25℃
Brechungsindex	1.6000 (estimate)
storage temp.	Inert atmosphere,2-8°C
Löslichkeit	Chloroform (Slightly), DMSO (Slightly)
Aggregatzustand	powder to lump
Farbe	White to Light yellow
Wasserlöslichkeit	soluable
Stabilität	Hygroscopic
InChIKey	SBJCUZQNHOLYMD-UHFFFAOYSA-N
LogP	0.91 at 25℃
CAS Datenbank	3173-72-6(CAS DataBase Reference)
IARC	3 (Vol. 19, Sup 7, 71) 1999
NIST chemische Informationen	Naphthalene, 1,5-diisocyanato-(3173-72-6)
EPA chemische Informationen	1,5-Naphthalene diisocyanate (3173-72-6)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20-36/37/38-42-52/53-37-26-36/38
S-Sätze:	26-28-38-45-61-42-36-51-22
RIDADR	2206
RTECS-Nr.	NQ9600000
HazardClass	6.1(b)
PackingGroup	III
HS Code	29291090

Gefahreninformationscode (GHS)

1,5-Naphthalene diisocyanate Chemische Eigenschaften,Einsatz,Produktion Methoden

ERSCHEINUNGSBILD
WEISSE BIS HELLGELBE KRISTALLE.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen unter Bildung giftiger Rauche (Stickstoffoxide, Kohlenmonoxid, Isocyanat-Dämpfe, Spuren von Cyanwasserstoff). Reagiert mit Säuren, Alkoholen, Aminen, Basen, starken Oxidationsmitteln, starken Reduktionsmitteln, Wasser.
ARBEITSPLATZGRENZWERTE
TLV nicht festgelegt (ACGIH 2005).
MAK: Sensibilisierung der Atemwege; Krebserzeugend Kategorie 3B; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den Körper durch Inhalation des Aerosols und durch Verschlucken.
INHALATIONSGEFAHREN
Verdampfung bei 20°C vernachlässigbar; eine gesundheitsschädliche Partikelkonzentration in der Luft kann jedoch beim Dispergieren schnell erreicht werden, vor allem als Pulver.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION:
Die Substanz reizt die Augen, die Haut und die Atemwege.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
Wiederholte oder andauernde Inhalation kann asthmatische Beschwerden hervorrufen.
LECKAGE
Verschüttetes Material in abdichtbaren Behältern sammeln. Reste sorgfältig sammeln. An sicheren Ort bringen. NICHT in die Umwelt gelangen lassen. Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel.
R-Sätze Betriebsanweisung:
R20:Gesundheitsschädlich beim Einatmen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R42:Sensibilisierung durch Einatmen möglich.
R52/53:Schädlich für Wasserorganismen, kann in Gewässern längerfristig schädliche Wirkungen haben.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S38:Bei unzureichender Belüftung Atemschutzgerät anlegen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
Beschreibung
Naphthalene diisocyanate (NDI) occurs as white to lightyellow crystalline flakes with a characteristic odor. NDI is incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions. NDI can react with water to form amines and liberate carbon dioxide.
Chemische Eigenschaften
Naphthylene 1,5-diisocyanate is a solid, m.p. 128°C. It has a lower vapour pressure than tolylene diisocyanate and is therefore less toxic in use; it does, however, have sensitizing properties.
Verwenden
Naphthylene 1,5-diisocyanate is mainly used for the production of elastomers.
Verwenden
NDI is used as a curing agent in the manufacture of elastomers.
Verwenden
Manufacture of polyurethane solid elastomers.
Definition
ChEBI: 1,5-Naphthalene diisocyanate is a member of naphthalenes.
synthetische
Naphthylene 1,5-diisocyanate (NDI) is prepared from naphthalene as follows:
Allgemeine Beschreibung
White to light-yellow crystalline flakes.
Reaktivität anzeigen
Isocyanates and thioisocyanates, such as 1,5-Naphthalene diisocyanate, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
Hazard
Irritant. Questionable carcinogen.
Flammability and Explosibility
Non flammable
Sicherheitsprofil
A powerful allergen. An irritant. Questionable carcinogen. When heated to decomposition it emits toxic fumes of NOx.
Environmental Fate
NDI is a synthetic organic chemical. It is a natural derivative of primary amines with the general formula R–N]C]O which does not occur naturally in the environment. At room temperature it can be a liquid or crystal. It is miscible with alcohol, diglycol, monoethyl ether, ether, acetone, carbon tetrachloride, benzene, chlorobenzene, kerosene, and olive oil; however, it may react violently with alcohol, water, acid, bases, and strong alkaline materials and tertiary amines and generate enough heat to self-ignite and release toxic combustion products. NDI is not readily biodegradable; however, it reacts with water and most acids producing unstable carbonic acids, which subsequently decarboxylate yielding relatively chemically inert and insoluble polymeric urea. While these polyureas are persistent, studies have indicated that they pose virtually no potential for adverse impacts on the aquatic environment. Due to hydrolysis in water, bioaccumulation of NDI is not expected. Since the hydrolysis products formed are irritants, there is a potential for inhalation exposure. The degree stability is a function of humidity.
Toxicity evaluation
The toxicological properties of isocyanates are attributed to the –N=C=O group. It is thought to react vigorously and exothermically with water forming an unstable carbamic acid that dissociates to form a primary amine with liberation of CO2. Hence, the primary amine will react further generating a urea derivative. Isocyanates also react readily with all organic compounds resulting in polymerization. Such reactions denature proteins, form abnormal crosslinkages, and generally disorganize the protein resulting in alteration of its normal function. This reactivity with proteins can account for its potency as a sensitizing agent. An IgE- or IgG-mediated mechanism has been proposed, but has not been definitively linked to isocyanate exposure. There is also evidence that inflammation and morphological changes of the bronchia mucosa and direct neurogenic mechanisms could be involved in the mechanics of toxicity. Thus, more than one reaction may occur in a system at a given time.

1,5-Naphthalene diisocyanate Upstream-Materialien And Downstream Produkte

Naphthylen-1,5-diisocyanat Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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