NAPHTHOLBENZEIN

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 ID: Syn:  4(α-(4-hydroxy-1-naphthyl)benzylidenenaphthalene-1(4H)-one CAS No.: 145-50-6 
E-C No.:205-656-3	   Weight:  374.43g/mol 	Formula: C27H18O2

2. HAZARDS ID: GHS:  Long-term aquatic hazard (Cat 4)

HMIS Classification: Health hazard  0, Flammability   0,  Physical hazards   0			
NFPA Rating: Health hazard  0, Fire     0, Reactivity hazard   0
2.3: Other Hazards: none

3. COMPOSITION / INFO: 
Chemical								 CAS No.	                Percent		
4(α-(4-hydroxy-1-naphthyl)benzylidene)naphthalene-1(4H)-one	 	145-50-6                 100%                  

4. FIRST AID: Eyes: Rinse with water. Skin: Rinse with soap & water. Ingestion: Do not induce vomiting without medical advice. Rinse with water. Inhalation: Move to fresh air.  Physician: Treat symptomatically & supportively. 

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. Vapors may be heavier than air. They spread along the ground & collect in confined areas. Hazards: Carbon oxides. Extinguishing: Use water spray, dry chem, carbon dioxide, or alcohol-resistant foam. Flash Pt: N/a Auto-ignition Temp: N/a Explosion Limits: N/A

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 or absorb material, then place into a suitable clean, dry container for disposal. Avoid generating dusty conditions. Flush spill area with water. Provide ventilation.

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation & accumulation. Do not get into eyes, on skin, or on clothing. Do not breathe dust. Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatibles.

8. EXPOSURE: 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			ACGIH			NIOSH		OSHA Final / vacated PELs
p-Naphtholbenzein     	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 EN 166. Skin: Wear appropriate protective gloves to prevent skin exposure. 0.11mm thick nitrile. 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 respirators when necessary.

9. PHYSICAL & CHEM: Red to brown powder 
   
10. STABILITY & REACTIVITY: Incompatibilities: Oxidizing agents. Stability: Stable at room temp.  in closed containers under normal storage & handling. Avoid: Incompatibles, dust generation, excess heat. Haz Decomp: see section 5

11. TOXICOLOGICAL INFO: RTECS#: unlisted.   LD50/LC50: Not available.   
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 guidelines to ensure complete and accurate classification. RCRA P-Series: None listed. RCRA U-Series: None listed.

14. TRANSPORT INFO: Not regulated.

15. REGULATORY INFO: SARA 311/312: None
Section 302 (RQ) and Section 302 (TPQ): None of the chemicals in this product have an RQ or a TPQ.
Section 313: No chemicals are reportable under Section 313.
STATE: is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know: 4-(??-(4-hydroxy-1-naphthyl)benzylidene)naphthalene-1(4H)-one CAS#145-50-6
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
Hazard Symbols: XN	WGK (Water Danger/Protection): CAS# 145-50-6: No information found.   
Canada DSL/NDSL List: CAS#145-50-6 is listed on DSL.  CAS#145-50-6 is not listed on NDSL List.
Canada WHMIS: This product has a WHMIS classification of D2B.
Canadian Ingredient Disclosure List: CAS#145-50-6    is listed on the Canadian 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.