1.08380

Cloruro di 2,3,5-trifeniltetrazolio

Color indicator. Supplement in culture media for the microbiological analysis of food and water samples

• Sinonimo/i: TPTZ, TTZ, Tetrazolio rosso
• Formula empirica (notazione di Hill): C₁₉H₁₅ClN₄
• Numero CAS: 298-96-4
• Peso molecolare: 334.80
• Beilstein: 3923356
• Numero MDL: MFCD00011963
• Codice UNSPSC: 41106212
• NACRES: NA.74

Proprietà

• Livello qualitativo: 200
• Saggio: ≥98% (calculated on dried substance, perchloric acid titration)
• Forma fisica: solid
• pH: 3.7 (20 °C, 10 g/L in H₂O)
• Punto di fusione: 243 °C (decomposition)
• Solubilità: 150 g/L
• Densità bulk: 230 kg/m³
• applicazioni: microbiology
• Temperatura di conservazione: 2-30°C
• Stringa SMILE: [Cl-].c1ccc(cc1)-c2nn(-c3ccccc3)[n+](n2)-c4ccccc4
• InChI: 1S/C19H15N4.ClH/c1-4-10-16(11-5-1)19-20-22(17-12-6-2-7-13-17)23(21-19)18-14-8-3-9-15-18;/h1-15H;1H/q+1;/p-1; PKDBCJSWQUOKDO-UHFFFAOYSA-M

Descrizione

Descrizione generale

2,3,5-triphenyltetrazolium chloride (TTC) is a dye largely used for enumeration of microbial colonies in solid culture media, being a key component of the dry rehydratable film system used for microbiological analysis of food. This dye is colorless in the oxidized form and red when reduced by microorganisms, due to formation of formazan. Live microorganisms reduce TTC by enzymatic action, forming red color formazan that is kept inside granules in the cells.

Applicazioni

2,3,5-triphenyltetrazolium chloride (TTC) is an indicator recommended for the microbiological analysis of food.

Risultati analitici

Assay (perchloric acid titration, calculated on dried substance): ≥ 98 %
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (water): 245 - 248 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0,01 g/l; water; calculated on dried substance): ≥ 770
TLC-Test: passes test
Loss on drying (70 °C; ≤ 1 hPa): ≤ 0.5 %
Suitability for testing the germinability of seeds: passes test
Suitability for microbiology: passes test

Informazioni sulla sicurezza

• Pittogrammi: GHS02,GHS07
• Avvertenze: Danger
• Indicazioni di pericolo: H228 - H315 - H319
• Consigli di prudenza: P210 - P240 - P241 - P264 - P302 + P352 - P305 + P351 + P338
• Classi di pericolo: Eye Irrit. 2 - Flam. Sol. 1 - Skin Irrit. 2
• Codice della classe di stoccaggio: 4.1B - Flammable solid hazardous materials
• Classe di pericolosità dell'acqua (WGK): WGK 3