1.59375

Phenol red

pH indicator, Reag. Ph Eur

• Synonym(s): Phenol red
• Linear Formula: (C₆H₄OH)₂C₇H₄SO₃
• CAS Number: 143-74-8
• Molecular Weight: 354.38
• MDL number: MFCD00003552
• UNSPSC Code: 12171502
• EC Index Number: 205-609-7
• NACRES: NA.21

Properties

• product name: Phenol red, (phenolsulfonphthalein) Reag. Ph Eur
• Agency: reag. Ph. Eur.
• Quality Level: 200
• Assay: 98.0-102.0% (bromatometric, calculated on dried substance)
• form: solid
• loss: ≤1.0% loss on drying, 105°C
• mp: >300 °C
• bulk density: 200‑300 kg/m³
• storage temp.: no temp limit
• InChI: 1S/C19H14O5S/c20-15-9-5-13(6-10-15)19(14-7-11-16(21)12-8-14)17-3-1-2-4-18(17)25(22,23)24-19/h1-12,20-21H
• InChI key: BELBBZDIHDAJOR-UHFFFAOYSA-N

Description

Application

• Antitussive, Expectorant and Antipyretic Effect of the Ethanolic Extract of the Leaves of Momordica charantia L.: This study investigates the application of phenol red in assessing the bioactivities of plant extracts, demonstrating the versatility of phenol red in chemical assays (Ribeiro et al., 2024).
• Chemical Analysis by LC-MS of Cannabis sativa Root Samples from Northeast Brazil and Evaluation of Antitussive and Expectorant Activities.: Phenol red was used as part of the LC-MS methodology to analyze plant roots, highlighting its role in modern analytical techniques (Menezes et al., 2022).
• Quantifying Sample Collection and Processing Impacts on Fiber-Based Tear Fluid Chemical Analysis.: Phenol red is utilized to quantify changes in tear fluid composition, underscoring its importance in clinical chemical analysis (Barmada & Shippy, 2020).
• The In Vitro Activity of Essential Oils against Helicobacter Pylori Growth and Urease Activity.: This research uses phenol red in enzyme inhibition studies, contributing to the understanding of antimicrobial properties of essential oils (Korona-Glowniak et al., 2020).

Analysis Note

Assay (bromatometric, calculated on dried substance): 98.0 - 102.0 %
Identity (UV/VIS-Spectrum): passes test
Identity (Color transition): passes test
Identity (Bromination): passes test
Insoluble substances: ≤ 0.5
Sulfated ash: ≤ 0.2
Loss on Drying (105°C): ≤ 1.0

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H315,H335
• Precautionary Statements: P261 - P264 - P271 - P280 - P302 + P352 - P304 + P340 + P312
• Hazard Classifications: Skin Irrit. 2 - STOT SE 3
• Target Organs: Respiratory system
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable