1-NITROSO-2-NAPHTHOL

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: CAS No.: 131-91-9 E-C No.:205-043-0  Weight:  173.17g/mol 	Formula: C10H7NO2

2. HAZARDS ID: GHS Class:  Acute toxicity, Oral (Category 4) Skin irritation (Category 2)   Eye irritation (Category 2A)	
		Skin sensitization (Category 1)   Germ cell mutagenicity (Cat. 2)  Acute Aquatic hazard (Cat 2)
 Pictogram: 				   	
Signal Word:         WARNING
HAZARD STATEMENT: H302 + H312 + H332: Harmful if swallowed, in contact with skin or inhaled.  H319: Causes serious eye irritation.   H315: Causes skin irritation.  H317: May cause an allergic skin reaction. H341: Suspected of causing genetic defects. H401: Toxic to Aquatic life.
PRECAUTIONARY STATEMENT: P201: Obtain special instructions before use. P202: Do not handle until all safety precautions have been read and understood. P261: Avoid breathing dust/spray/ fume/gas/ mist/ vapors. P264: wash skin thoroughly after handling. P270: Do not drink, eat, smoke, when using this product. P272: Contaminated work clothing must not be allowed out of the workplace. P373: Avoid release to the environment.  P280: Wear protective gloves/eye & face protection. P330: Rinse mouth. P301 + P312: If swallowed: Call Poison Center or doctor/physician if you feel unwell. P302 + P352: If on skin gently wash with plenty of soap & water.    P405: Store locked up. P304 + P340: If inhaled: remove to fresh air and keep at rest in a position comfortable for breathing. P305 + P351 + P338: If in Eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present & easy to do so. Continue rinsing. P308 +P313: If exposed or concerned: contact doctor/physician.
P312; Call Poison Center or doctor/physician if you feel unwell. P321: Specific treatment (see supplemental first aid instructions). P332 + P313: If skin irritation occurs: consult physician.   P337 + P313: If eye irritation occurs: consult physician. P403 + P233: Store in a well-ventilated place. Keep container tightly closed. P501: Dispose of contents/container to an approved waste disposal plant.

HMIS Classification: 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		
1-Nitroso-2-Naphthol	  131-91-9                     98%                  

4. FIRST AID: Eyes: Rinse immediately with plenty of water for 15 min. 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 oxides. Extinguishing: Use water spray, dry chem, CO2, 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. Avoid prolonged or repeated exposure.
Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
   
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
1-Nitroso-2-Naphthol		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 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 respirator when necessary. 

9. PHYSICAL & CHEM: Appearance:  Brown powder Melting Pt: 106-108°C 

10. STABILITY & REACTIVITY:  Haz Decomp:  see sec 5 Stability: Stable at room temp in closed containers under normal storage & handling. Avoid:  Strong oxidizing agents, bases. Incompatibilities:  Strong bases & oxidizing agents

11. TOXICOLOGICAL INFO: RTECS: QL4725000    LD50/LC50: LD50 Oral Rat-500 mg/kg
Carcinogenicity: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA. Other: May cause respiratory irritation

12. ECOLOGICAL INFO: Environmental Fate: LC50 Oryzias latipes – 0.4mg/l-48h

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
SARA Section 302 Extremely Hazardous Substances None of the chemicals in this product have a TPQ.
Section 313 No chemicals are reportable under Section 313. 
STATE CAS#131-91-9 is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know:	1-Nitroso-2-naphthol CAS#131-91-9		
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 
Hazardous Symbols:  XN	WGK (Water Danger/Protection) CAS#131-91-9:   No information available. 
Canada - DSL/NDSL:  CAS# 131-91-9  is listed on Canada’s DSL List. is not listed on Canada’s NDSL 
Canada – WHMIS:  Not available. 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.