2,3,5,6-Tetrachloropyridine

Bezeichnung:2,3,5,6-Tetrachloropyridine

CAS-Nr2402-79-1

Englisch Name:2,3,5,6-Tetrachloropyridine

CBNumberCB4486545

SummenformelC5HCl4N

Molgewicht216.88

MOL-Datei2402-79-1.mol

2,3,5,6-Tetrachloropyridine physikalisch-chemischer Eigenschaften

Schmelzpunkt	90.5°C
Siedepunkt	251.6°C
Dichte	2.0309 (rough estimate)
Dampfdruck	3Pa at 25℃
Brechungsindex	1.6000 (estimate)
Flammpunkt	188°C
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	very soluble in Ether,Ethanol
Aggregatzustand	Crystalline
pka	-5.50±0.50(Predicted)
Farbe	White to Almost white
BRN	129639
InChIKey	FATBKZJZAHWCSL-UHFFFAOYSA-N
LogP	3.87 at 30℃ and pH7
Oberflächenspannung	72.4mN/m at 20.7mg/L and 21.3℃
CAS Datenbank	2402-79-1(CAS DataBase Reference)
EPA chemische Informationen	2,3,5,6-Tetrachloropyridine (2402-79-1)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	20/21/22-36/37/38-51/53
S-Sätze:	26-36/37/39-60-61-36
RIDADR	2811
RTECS-Nr.	UT8225000
Hazard Note	Harmful/Irritant
TSCA	TSCA listed
HazardClass	6.1
PackingGroup	III
HS Code	2933392000
Giftige Stoffe Daten	2402-79-1(Hazardous Substances Data)
Toxizität	mouse,LD50,intraperitoneal,1150mg/kg (1150mg/kg),BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)LIVER: FATTY LIVER DEGERATIONBEHAVIORAL: ANTIPSYCHOTIC,Toxicology and Applied Pharmacology. Vol. 11, Pg. 361, 1967.

Gefahreninformationscode (GHS)

2,3,5,6-Tetrachloropyridine Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R51/53:Giftig 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.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S60:Dieses Produkt und sein Behälter sind als gefährlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Verwenden
2,3,5,6-Tetrachloropyridine is used as a chemical intermediate in the production of chlorpyrifos and triclopyr.
Synthese
2,3,5,6-Tetrachloropyridine is synthesised in three steps by chemical reaction using 2,3,4,5,6-pentachloropyridine as a raw material. The specific synthesis steps are as follows:
Step (1): 2 parts of pentachloropyridine was dissolved in 200 parts of ethanol at 40 ℃ until 0.6 part of metallic manganese powder was added after the raw material was completely dissolved; 1.3 parts of ammonium acetate, 5 parts of water and 10 parts of ethanol were mixed Uniform dropping, dropping time of 2h; After completion of the dropwise addition, the reaction solution was stirred for 4 hours.
Step (2): add ammonia to adjust the pH value of 8~9, heated to 65 , through 3L / min air 1h reaction was oxidized.
Step (3): Oxidation liquid filtration: The resulting solid was filtered and separated by washing with 20 parts of toluene. Ethanol washed twice, washed twice, after dryingproduct. Products tested by the magnetic content of manganese oxide products, the specific surface area of 53m2 / g, Mn content of 70.90%, CaO content0.0012%, K content 0.0005%, Na content 0.0025%, S content 0.0070%. The XRD pattern of manganese tetroxide and the comparison with the standard map is Mn3O44. Figure 5 (a) and (b) are scanning electron micrographs. It can be seen that the product is a hollow spherical structure. (C) and (d) are transmission electron micrographs, and the hollow structure can be seen and the product is from 10 to 25 nm Grain composition. The filtrate was filtered and the organic solution of the solution of manganese tetrachloride was combined and evaporated to recover the toluene solvent. Then, 10 parts of 5% dilute hydrochloric acid was added at a temperature of 65 ℃ and stirred for 1 h to obtain 2,3,5,6-tetrachloropyridine ; The yield was 99.5%.

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