MSDS Phenolphthalein (C20H14O4) – Safety Data Sheet & GHS Hazards

Summary MSDS for Phenolphthalein (C20H14O4), CAS 77-09-8: substance identity, GHS hazard classification, hazard and precautionary statements, and links to the manufacturer's official SDS.

Phenolphthalein, CAS 77-09-8, 25 g – Smartlab A-2046

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Phenolphthalein, CAS 77-09-8, 25 g – Smartlab A-2046

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Identity summary

Name Phenolphthalein
Other names (IUPAC) 3,3-bis(4-hydroxyphenyl)-2-benzofuran-1-one
Molecular formula C20H14O4
CAS number 77-09-8
Molar mass 318.3 g/mol
PubChem CID 4764

Molar mass of C20H14O4 and how to calculate it

The molar mass of C20H14O4 is 318.33 g/mol, the sum of the relative atomic masses of all atoms in the formula: 20 × 12.011 + 14 × 1.008 + 4 × 15.999 = 318.33 g/mol.

Element Atoms Atomic mass Contribution Mass %
C 20 12.011 240.22 75.46%
H 14 1.008 14.11 4.43%
O 4 15.999 64.00 20.10%

So 1 mol of C20H14O4 weighs 318.33 g, and 1 L of a 0.1 M solution needs 31.833 g of pure C20H14O4. For liquid or concentrated reagents, work from assay and density with the dilution formula. Calculate other compounds with the molar mass calculator.

Hazard identification (GHS)

Signal word: DANGER

Pictograms:

GHS08 – Health hazard
Health hazard

Meaning of all GHS hazard symbols

Hazard statements (H)

  • H360: May damage fertility or the unborn child.
  • H370: Causes damage to organs.
  • H341: Suspected of causing genetic defects.
  • H351: Suspected of causing cancer.

Precautionary statements (P)

Prevention

  • P260: Do not breathe dust.
  • P270: Do not eat, drink or smoke when using this product.
  • P202: Do not handle until all safety precautions have been read and understood.
  • P201: Obtain special instructions before use.
  • P264: Wash skin thoroughly after handling.
  • P280: Wear protective gloves/ protective clothing/ eye protection/ face protection.

Response

  • P308 + P311: IF exposed or concerned: Call a POISON CENTER/doctor.

Storage

  • P405: Store locked up.

Disposal

  • P501: Dispose of contents/ container to an approved waste disposal plant.

The GHS classification above matches TCI (Tokyo Chemical Industry) official data for product P0094 Phenolphthalein. Substance identity from PubChem CID 4764.

Download the official SDS & CoA

The applicable Safety Data Sheet is the manufacturer's SDS for the product and lot you purchase. For products available from AMI Scientific:

TCI P0094 – Phenolphthalein Official SDS & CoA (TCI)
Phenolphthalein, CAS 77-09-8, 25 g – Smartlab A-2046 View product

SDS and lot-specific CoA are sent with the quotation/order or on request.

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What is an MSDS/SDS?

An MSDS (Material Safety Data Sheet), now called an SDS (Safety Data Sheet), is a 16-section document describing the hazards, handling, storage, first aid, and disposal of a chemical. Read the full MSDS guide and other MSDS pages.

This summary was compiled by AMI Scientific from TCI official GHS data for information purposes. Classification may differ by concentration, form, and supplier. Always refer to the manufacturer's official SDS for the product and lot you use. Updated: 06-11-2026.