o-CRESOLPHTHALEIN
					     Safety Data Sheet
 Emergency Telephone Number:  1-800-424-9300          Dudley Chemical Corporation: (732) 886-3100    
       
DUDLEY CORPORATION
125 Kenyon Drive
  Lakewood, New Jersey 08701
Effective Date: January 1, 2025
1. PRODUCT ID: Syn: 3,3-Dimethylphthalein. 	CAS No. : 596-27-0. EC-No.:  209-881-8	
 Weight : 346.38.              	Formula : C22H18O4 

2.HAZARDS ID: GFS Classification:  Not a hazardous substance or mixture
HMIS Classification:          Health hazard:     0    Flammability:     0          Physical hazards       0                                       
NFPA Rating:                       Health hazards:   0     Fire:       0                          Reactivity hazard:     0

Potential Health Effects: Eyes:  May cause eye irritation. Skin: May be harmful absorbed through skin/causing skin irritation. Ingestion: May be harmful if swallowed. Inhalation: May be harmful if inhaled/causing respiratory irritation.
2.3: Other Hazards: none

3.COMPOSTITION/INFO ON INGREDIENTS	     
Chemical Name        	    	CAS No. 	            	Percent	     	
o-Cresolphthalein                 		596-27-0                    98%                 

4. FIRST AID MEASURES: Eyes:  Flush eyes w/ plenty of water as a precaution. Skin: flush skin with plenty of soap & water. Ingestion: Never give anything by mouth to an unconscious person. Do not induce vomiting. If conscious and alert, give water to rinse mouth.     Inhalation: Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.

5. FIREFIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH & full PPE. Irritating & highly toxic gases may be generated by thermal decomp/combustion. Special hazards:  Carbon oxides. 
 Extinguishing: Use water spray, dry chemical, carbon dioxide, or alcohol-resistant foam.

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section 8.
Spill/Leaks: Clean up spills immediately, observing precautions in the Protective Equipment 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. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin and clothing.   Keep container tightly closed. Avoid ingestion and inhalation.  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:  : Facilities storing or utilizing this material should be equipped with an eyewash facility and safety shower. Use adequate ventilation to keep airborne concentrations low.
Chemical Name		ACGIH			NIOSH		OSHA-FINAL/Vacated PEL’s
o-Cresolphthalein		None listed		None listed	None listed

PPE: Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA’s eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators: Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

9.  PHYSICAL & CHEM: Appearance: White or yellow-white powder  Melting Pt: 219 - 221 C (426 - 430°F) – lit.     

10. STABILITY & REACTIVITY: Stability: Stable under normal temperatures & pressures. Avoid: dust generation, strong oxidants. Incompatibilities: Oxidizing agents Hazardous Decomp: see section 5 

11. TOXICOLOGICAL INFO: RTECS#: SM8390000.    LD50/LC50: Not available
Carcinogenicity:    CAS# 596-27-0: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.

12. ECOLOGICAL INFO: Environmental Fate & Toxicity:  No information available. 

13.  DISPOSAL CONSIDERATIONS: Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. U.S. 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 classification.  
RCRA P-Series: None listed.    RCRA U-Series: None listed. 

14.  TRANSPORT INFO: Not dangerous goods.

15.  REGULATORY INFO: SARA 311/312 Hazards: No SARA hazards.
SARA Section 302 (RQ & TPQ):  None of the chemicals in this material have an RQ or TPQ.
Section 313:  No chemicals are reportable under Section 313.
STATE CAS# 596-27-0 is not present on state lists from CA, MN, FL
Pa & NJ Right to Know:  3,3-Bis(4-hydroxy-m-tolyl)phthalide    CAS# 596-27-0 
California No Significant Risk Level: None of the chemicals in this product are listed. 

EUROPEAN/INTERNATIONAL REGULATIONS European Labeling in Accordance with EC Directives 
Hazard Symbols: Not available. WGK (Water Danger/Protection) CAS# 596-27-0: 1 

Canada - DSL/NDSL CAS# 596-27-0 is listed on Canada’s DSL List. Canada - WHMIS: Not available. 

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.