1.06202

1-Naphtholbenzein

pH indicator, Reag. Ph Eur

• Synonyme(s) : 1-Naphtholbenzein
• Formule empirique (notation de Hill): C₂₇H₁₈O₂
• Numéro CAS: 145-50-6
• Poids moléculaire : 374.43
• Code UNSPSC : 12352115
• Numéro de classement CE : 205-656-3
• Nomenclature NACRES : NB.21

Propriétés

• product name: 1-Naphtholbenzein, indicator Reag. Ph Eur
• Agence: reag. Ph. Eur.
• Niveau de qualité: 200
• Forme: solid
• Perte: ≤7% loss on drying, 105°C
• visual transition interval: 8.0-9.6, apricot to turquoise
• Pf: 243-245 °C
• Masse volumique apparente: 120‑300 kg/m³
• λmax: 622-626 nm (perchloric acid (0,1 mol/l) in acetic acid)
• Température de stockage: 2-30°C
• InChI: 1S/C27H18O2/c28-25-16-14-23(19-10-4-6-12-21(19)25)27(18-8-2-1-3-9-18)24-15-17-26(29)22-13-7-5-11-20(22)24/h1-17,28H/b27-24+
• Clé InChI: VDDWRTZCUJCDJM-SOYKGTTHSA-N

Description

Application

• Use of turbidimeter for measurement of solid catalyst system component in a reactor feed.: This study discusses the application of a turbidimeter to measure the concentration of solid catalyst components in a reactor feed, highlighting its significance in optimizing catalytic processes (Elsevier, 2020).

Remarque sur l'analyse

Identity (IR-spectrum): passes test
Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max.(perchloric acid (0,1 mol/l) in acetic acid): 622 - 626 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.005 g/l;perchloric acid (0,1 mol/l) in acetic acid;calculated on dried substance): 640 - 950
Transition range: pH 8,0 - pH 9,6; apricot - turquoiseblue
Loss on Drying (105°C): ≤ 7 %
Suitability as indicator (for non-aqueous titration): passes test

Informations sur la sécurité

• Mentions de danger: H413
• Conseils de prudence: P273 - P501
• Classification des risques: Aquatic Chronic 4
• Code de la classe de stockage: 11 - Combustible Solids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): Not applicable
• Point d'éclair (°C): Not applicable