DIPHENYLCARBAZONE 

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: Diazenecarboxylic acid, phenyl-,2-phenylhydrazide; Diphenylcarbazone; 1,5-Dipenylcarbazone; s-Diphenylcarbazone; Formic acid, (phenylazo)-,2phenylhydrazide. CAS No.: 538-62-5   Weight: 240.26   Formula: C13H12N4O

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

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 ON INGREDIENTS: 
Chemical Name				CAS No.		Percent		 Hazardous
Diphenylcarbazone                                          	538-62-5         	 >99%                  	      No 

4. FIRST AID:  Eyes: Rinse immediately with plenty of water and seek medical advice. Skin: Rinse with plenty of soap & water and seek medical advice. Ingestion: Do not induce vomiting without medical advice. Rinse with water. Consult physician. Inhalation: Move to fresh air.  Consult a physician. Physician: Treat symptomatically & supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH & full PPE. Irritating & highly toxic gases may be generated by thermal decomposition or combustion. This material in sufficient quantity and reduced particle size is capable of creating a dust explosion. Special Hazards: Carbon & Nitrogen oxides.
Extinguishing: use water, carbon dioxide, dry chemical powder, or alcohol-resistant foam. 
Flash Point: Not applicable. Auto-ignition Temp: Not applicable. Explosion Limits: Not available. 

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section 8. Spills/Leaks: Clean up spills immediately, observing precautions in the PPE Section. Sweep up material, then place into a suitable container for disposal. Avoid generating dusty conditions. Ventilate area and wash spill site after material pickup is complete.  

7. HANDLING & STORAGE:  Handling: Wash thoroughly after handling. Avoid contact and inhalation. Avoid contact with eyes, skin, and clothing. Remove contaminated clothing and wash before reuse. Use with adequate ventilation.
Storage: Keep container closed when not in use. Store in a cool, dry area away from incompatible substances. 

8. EXPOSURE CONTROLS / PERSONAL PROTECTION: Controls: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels. 

Chemical Name                  	 	ACGIH                     NIOSH                   OSHA – Final/Vacated PELs 
Diphenylcarbazone	           		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. 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 EN149 approved respirator when necessary. 

9. PHYSICAL & CHEM:  Appearance: Orange powder. Odor: Odorless.  Vapor Density: 8.28 Melting Pt: 153-157°C (307-315°F) Solubility: Insoluble. 

10. STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Avoid: High temperatures, dust generation.  Incompatible: Strong oxidizing agents. Hazardous Decomp: see section 5

11. TOXIC INFO: RTECS#: LQ9420000  LD50/LC50: No data Carcinogenicity: Not by ACGIH, IARC, NIOSH, NTP, or OSHA. 

12. ECOLOGICAL INFO: No information available. 

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 classification. RCRA P-Series: None listed. RCRA U-Series: None listed. 

14. TRANSPORT REGULATIONS: No information available. 

15. REGULATORY INFO: SARA 311/312: None
Section 302 Extremely Hazardous Substances: None of the chemicals in this product have a TPQ/RQ. 
Section 313 No chemicals are reportable under Section 313. 
STATE CAS# 538-62-5 is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know: Diphenylcarbazone  CAS#538-62-5
California Prop.65 components: 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: Not available  WGK (Water Danger/Protection) CAS# 538-62-5: No information available.   
Canada - DSL/NDSL CAS# 538-62-5 is listed on Canada’s DSL List. 
Canada - WHMIS This product has a WHMIS classification of D2B.
Canadian Ingredient Disclosure List No information 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.