HYDROXY NAPHTHOL BLUE

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: CAS No.: 165660-27-5 Weight:  598.49g/mol 	Formula: C20H12N2Na2O11S3

2. HAZARD: GHS:   Eye irritation (Category 2A)		
 Pictogram: 				                 
Signal Word:         WARNING
HAZARD STATEMENT: H319: Causes serious eye irritation.		
 PRECAUTIONARY STATEMENT: P264: Wash skin thoroughly after handling P280: Wear protective gloves/eye & face protection P305 + P351 + P338: If in Eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if 
present  &  easy to do so. Continue Rinsing.	P337 + P313: If eye irritation occurs: consult physician

HMIS Class: Health hazard  2, Flammability   0,  Physical hazards   0			
NFPA Rating: Health hazard  2, Fire     0, Reactivity hazard   0
2.3: Other Hazards: none

3. COMPOSITION / INFO ON INGREDIENTS: 
Chemical 				 CAS No.	 	Percent		
Hydroxy Naphthol blue disodium                 165660-27-5         90-100%                  

4. FIRST AID: Eyes: Rinse immediately for 15 min 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 decomp/combustion. Hazards: Carbon, Nitrogen, sulfur, & sodium oxides. Extinguishing: use water spray, dry chemical, chemical foam, 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/Leaks: Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, observing precautions in the Protective Equipment section. Avoid generating dusty conditions. Provide ventilation. 

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation.  Avoid contact with eyes, skin, 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: 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 PEL’s
Hydroxy Naphthol Blue		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. 0.11 mm 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: Appearance: Blue - purple crystals. Odor: Odorless. Melting Pt: 274˚C (525˚F) Solubility: soluble
Relative Density: 2.130 g/cm3 pH: 7.9 

10. STABILITY & REACTIVITY: Stability: Stable at room temp in closed containers under normal storage & handling conditions. Avoid: Incompatibles. Incompatibilities: Strong oxidizing agents. Haz Decomp: See section 5

11. TOXIC INFO: RTECS: unlisted 	 LD50/LC50: Rabbit, mild skin & eye irritation
Carcinogenicity: Not in 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 classification.  RCRA P-Series: None listed. RCRA U-Series: None listed. 

14. TRANSPORT INFO: Not regulated. 

15. REGULATORY INFO: SARA 311/312: Acute Health Hazard
Section 302(TPQ/RQ) None of the chemicals in this product have a TPQ/RQ. 
Section 313  No chemicals are reportable under Section 313. 
STATE CAS# 165660-27-5 is not present on state lists from CA, PA, MN, FL, or NJ. 
California No Significant Risk Level: None of the chemicals in this product are listed. 

EUROPEAN/INTERNATIONAL REGULATIONS  European Labeling in Accordance with EC Directives 
Hazardous Symbols: Not available.  WGK (Water Danger/Protection) CAS# 165660-27-5: No information available. 
Canada - DSL/NDSLCAS# 165660-27-5 is not listed on Canada’s DSL/NDSL list. 
Canada – WHMIS: Not available.    CAS# 165660-27-5 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.