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2,5-Dichlorbenzoesaeure
Benzoic acid, 2,5-dichloro- · 2,5-DBA · 2,5-Dichlorobe · RARECHEM AL BO 0355 · 2,5-Dichlorobenzoic a · Irsogladine Impurity 2 · Irsogladine Impurity S · 5-Dichlorobenzoic acid
Identifikatoren & physikalische Daten
| CAS No. | 35915-19-6 |
|---|---|
| Summenformel | C7H4Cl2O2 |
| Durchschnittliche Molmasse | 191,01 g/mol |
| Monoisotopische Masse | 189,95883473 g/mol |
| SMILES | O=C(O)c1cc(Cl)ccc1Cl |
| InChIKey | QVTQYSFCFOGITD-UHFFFAOYSA-N |
| PubChem CID | 5784 |
| ChEMBL | CHEMBL326312 |
| ChEBI | CHEBI:132298 |
| EC No. | 200-065-7 |
| DTXSID | DTXSID5024978 |
| Lokaler Name | 2,5-Dichlorbenzoesaeure |
Chemische & physikalische Eigenschaften
| XLogP | 2,8 |
|---|---|
| Polarare Oberfläche (TPSA) | 37,3 |
| H-Brücken-Donoren | 1 |
| H-Brücken-Akzeptoren | 2 |
| Frei drehbare Bindungen | 1 |
| Schwere Atome | 11 |
| Formalladung | 0 |
| Komplexität | 161 |
| Stoffklassen | Other Classes -> Benzoic Acid Derivatives |
| Löslichkeit | less than 1 mg/mL at 66 °F (NTP, 1992)0.8g/l<0.1 g/100 mL at 19 ºC |
| Siedepunkt | 574 °F at 760 mmHg (NTP, 1992)301 °C (lit.) |
| Schmelzpunkt | 304 to 309 °F (NTP, 1992)151-154 °C (lit.) |
| Dampfdruck | 0.000447 [mmHg] |
| Physical Description | 2,5-dichlorobenzoic acid appears as needles (from water) or white powder. (NTP, 1992)Solid[CAMEO] White to beige powder[Acros Organics MSDS] |
| Dichte | 1.4410 (rough estimate) |
| Brechungsindex | 1.4590 (estimate) |
| Flammpunkt | 300-302°C |
| Lagerbedingungen | Store below +30°C. |
| Aggregatzustand | Powder |
| pKa (Säurekonstante) | 2.51±0.25(Predicted) |
| Farbe | White to beige |
| BRN | 973353 |
| Stabilität | Stable. |
| InChI | 1S/C7H4Cl2O2/c8-4-1-2-6(9)5(3-4)7(10)11/h1-3H,(H,10,11) |
| InChIKey | QVTQYSFCFOGITD-UHFFFAOYSA-N |
| SMILES | OC(=O)c1cc(Cl)ccc1Cl |
| CAS Datenbank | 50-79-3(CAS DataBase Reference) |
| NIST chemische Informationen | Benzoic acid, 2,5-dichloro-(50-79-3) |
| EPA chemische Informationen | Benzoic acid, 2,5-dichloro- (50-79-3) |
Sicherheit & Vorschriften
| GHS-Einstufung | This chemical does not meet GHS hazard criteria for 5.4% (3 of 56) of reports.WarningH315 (92.9%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 56 reports by companies from 10 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies. |
|---|---|
| Regulatorische Informationen | 2,5-Dichlorobenzoic acid: Does not have an individual approval but may be used under an appropriate group standard |
| Brandgefahren | Flash point data for this chemical are not availablehowever, it is probably combustible. (NTP, 1992) |
| Gesundheitsgefahren | SYMPTOMS: Symptoms of exposure to this compound include irritation. |
| Gefahrenübersicht | Causes rigidity (including catalepsy) and muscle contraction or spasticity in intraperitoneal lethal-dose studies of mice (LD50 = 237 mg/kg)[RTECS] An irritant[Acros Organics MSDS] |
| Reaktive Gruppe | Acids, Carboxylic |
| Reactivity Profile | Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in waterthose with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in it to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactionslike other acids, they often catalyze (increase the rate of) chemical reactions. |
| Air and Water Reactions | Insoluble in water. |
| Hazard Classes and Categories | Skin Irrit. 2 (92.9%) |
| Brandbekämpfung | Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992) |
| Erste Hilfe | EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop. |
| Freisetung ohne Brand | SMALL SPILLS AND LEAKAGE: Should a spill occur while you are handling this chemical, FIRST REMOVE ALL SOURCES OF IGNITION, then you should dampen the solid spill material with 60-70% ethanol and transfer the dampened material to a suitable container. Use absorbent paper dampened with 60-70% ethanol to pick up any remaining material. Seal the absorbent paper, and any of your clothes, which may be contaminated, in a vapor-tight plastic bag for eventual disposal. Solvent wash all contaminated surfaces with 60-70% ethanol followed by washing with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned. |
| Personal Protective Equipment (PPE) | RECOMMENDED RESPIRATOR: Where the neat test chemical is stored, weighed and diluted, wear an approved half face respirator equipped with an organic vapor/acid gas cartridge (specific for organic vapors, HCl, acid gas and SO2) with a dust/mist filter. (NTP, 1992) |
| Wassergefährdungsklasse (WGK) | 3 |
| TSCA-Inventar-Status | TSCA listed |
| Zollcode | 29163900 |
| RTECS-Nr. | DG6825000 |
| R-Sätze (R) | 36/37/38 |
| Gefahrensymbole | Xi |
| Sicherheitshinweise (S) | 26-36-24/25 |
| Lagerklasse | 11 - Combustible Solids |
| Gefahrenklasse | Eye Irrit. 2Skin Irrit. 2STOT SE 3 |
Anwendungen & Verwendung
Verwenden
2,5-Dichlorobenzoic acid was used as calibration standard to investigate the gas-phase OH reaction products of biphenyl, monochlorobiphenyl and dichlorophenyl
Herstellung & Synthese
synthetische
2,5-Dichlorobenzoic acid is obtained by reacting p-dichlorobenzene with phosgene to obtain 2,5-dichlorobenzoyl chloride, which is then hydrolyzed.