THYMOLPHTHALEIN ACS

Safety Data Sheet
Emergency Telephone Number: CHEMTREC 1-800-424-9300	For Information call: DUDLEY 732-886-3100        
DUDLEY CORPORATION
         	  125 Kenyon Drive
      				         	  Lakewood, New Jersey 08701
Effective Date:  January 1, 2025
1. PRODUCT: Syn: 5',5"-Diisopropyl-2',2"-dimethylphenolphthalein; 3,3-Bis[4-hydroxy-2-methyl-5-(1-methylethyl)phenyl]-1(3H)-isobenzofuranone CAS No.: 125-20-2.  EC No.: 204-729-7 Weight: 430.54 Formula: C28H3004.

2. HAZARDS: GHS: Not a hazardous substance or mixture.

HMIS Class: Health hazard  0, Flammability   0,  Physical hazards   0			
NFPA Rating: Health hazard 0, Fire     0, Reactivity hazard   0

Potential Effects: Eye: Risk of serious damage to eyes.	Skin: Harmful in contact with skin. 
Ingestion: Harmful if swallowed. 		Inhalation: Harmful by inhalation. 
2.3: Other Hazards: none

3. COMPOSITION / INFO:
Chemical 					      CAS No.	Percent		Hazardous
Thymolphthalein					      125-20-2	   99%		    No 

4. FIRST AID: Eyes: Rinse immediately w/ plenty of water. Skin: Rinse with plenty of soap & water. Ingestion: Do not induce vomiting w/o medical advice. Rinse with water.  Inhalation: Move to fresh air.  Physician: Treat symptomatically & supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH & full PPE. Water mist may be used to cool closed containers. Extinguishing: Use dry chemical, CO2, water spray or alcohol resistant foam.  Hazards:  Carbon oxides

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section 8. Spills: Clean up spills immediately, observing precautions in the PPE Section. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation. 

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation. Use with adequate ventilation. 
Storage: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatibles. 

8. EXPOSURE: Controls: Use adequate ventilation to keep airborne concentrations low.  Wear gloves 0.11mm thick. Name: Thymolphthalein. ACGIH: NIOSH: & OSHA -Final PELs: None

9. PHYSICAL & CHEM: Appearance. White needles or crystals/powder Melting Pt: 248-253°C 

10. STABILITY & REACTIVITY: Stability: Stable. Avoid: Incompatibles, dust generation, strong oxidants. Incompatibilities: Strong oxidizers.  Haz Decomp: see section 5

11. TOXIC INFO: RTECS#: unlisted. LD50/LC50: N/A. Carcinogenicity: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA. 

12. ECOLOGICAL INFO: No info. 

13. DISPOSAL CONSIDERATIONS: Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts 261.3. Additionally, waste generators must consult state and local hazardous waste regulations to ensure complete and accurate class.   
RCRA P-Series:  None listed       RCRA U-Series:  None listed.

14. TRANSPORT INFO: No info.

15.REGULATORY INFO: SARA 311/312: None
SARA Section 302 Extremely Haz None of the chemicals in this product have a TPQ.
Section 313 No chemicals are reportable under Section 313.

STATE CAS#125-20-2 is not present on state lists from CA, MN, MA, FL. 
Pa / NJ Right to Know:	3,3-bis(4-hydroxy-5-isopropyl-o-tolyl)phthalide  CAS#125-20-2
California Prop.65: None of the chemicals are known to cause cancer, birth defects, or any other reproductive harm.

EUROPEAN/INTERNATIONAL REGULATIONS European Labeling in Accordance with EC Directives
Hazardous Symbols: Not available. WGK (Water Danger/Protection) CAS#125-20-2:  Not listed.
Canada – DSL/NDSL CAS#125-20-2 is listed Canada’s DSL List.  CAS#125-20-2 is not listed on Canada’s NDSL List.
Canada – WHMIS This product has a WHMIS classification of NOT controlled.
CAS#125-20-2 is not listed on Canada’s Ingredient Disclosure List.

16. DISCLAIMER INFO: DUDLEY CORPORATION provides the information herein in good faith but makes no representation as to its comprehensiveness or accuracy. This document is intended only as a guide to the appropriate precautionary handling of the material by a properly trained person using this.  Individuals receiving the information must exercise their independent judgment in determining its appropriateness for a particular purpose. DUDLEY CORPORATION makes no representations or warranties, either expressed or implied, including without limitation and warranties of merchantability, fitness for a particular purpose with respect to the information set forth herein or to the product to which the information refers. Accordingly, DUDLEY CORPORATION will not be responsible for damages resulting from the use of or reliance upon this information.