4-(2-PYRIDYLAZO)RESORCINOL MONSODIUM SALT HYDRATE 

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:  PAR Monosodium salt CAS No.: 16593-81-0    Weight:  237.19g/mol Formula: C11H8N3NaO2.xH2O

2. HAZARDS ID: GHS Class:  	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
2.3: Other Hazards: none

3. COMPOSITION / INFO: 
Chemical 			 				CAS No.	 	Percent		
4-(2-PYRIDYLAZO)RESORCINOL MONSODIUM SALT HYDRATE 	16593-81-0	99%                  

4. FIRST AID: Eyes: Rinse with water. Skin: Rinse with plenty of 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 breath apparatus in pressure-demand, MSHA/NIOSH & full PPE. Special Haz: Carbon, nitrogen, sodium oxides Combustible Extinguish: Use water spray, alcohol-resistant foam, dry chem or CO2.

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Sect 8. Spills/Leaks: Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation & accumulation. Avoid contact with skin, eyes, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatibles.

8. EXPOSURE: Use adequate ventilation to keep airborne concentrations low. Use process enclosure, local exhaust ventilation, or other controls to control airborne levels.

Chemical 			ACGIH			NIOSH		OSHA Final /Vacated PELs
4-(2-pyridylazo)-resorcinol,		None listed		None listed	None listed
monosodium salt monohydrate

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 RN166. 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 29 CFR 1910.134 or European Standard EN149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.  

9. PHYSICAL & CHEM: Appearance: Brown-Orange powder

10 STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Avoid: Incompatibles, dust generation. Haz Decomp: see section 5 Incompatibilities: Strong oxidizing agents, acids, bases, acid chlorides, acid anhydrides.

11. TOXICOLOGICAL INFO: RTECS#: CAS# 15693-81-0 unlisted   LD50/LC50: Not available.
Carcinogenicity: CAS# 16593-81-0: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA.

12. ECOLOGICAL INFO: No information found.

13. DISPOSAL CONSIDERATIONS: Chemical waste generators must determine whether a discarded chemical is classified as hazardous. 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 INFO: No information found.

15. REGULATORY INFO: SARA 311/312/313:  None
Section 302 (RQ) and Section 302 (TPQ): None of the chemicals in this product have an RQ or TPQ.
State: CAS# 16593-81-0 is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know:	Resorcinol, 4(2-pyridylazo)-monosodium salt monohydrate  CAS#16593-81-0
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: Not available. WGK (Water Danger/Protection) CAS# 16593-81-0: No information available.
Canada DSL/NDSL: None of the chemicals in this product are listed on the DSL or NDSL list. 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.