PYROCATECHOL VIOLET
   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: Pyrocatechol sulfonphthalein; 1,2-Benzenediol, 4,4'-(3H-2,1-benzoxathiol-3-ylidene) bis-, S,S-dioxide; PV; Pyrocatecholsulfonephthalein.  EC-No.: 204-088-3 CAS No.: 115-41-3  Weight: 386.36 Formula:C19H14O7S 

2. HAZARDS ID: GHS Classification: Skin Irritation (Cat 2), Eye Irritation (Cat 2A)
Pictogram: 			          	                      
Signal Word: WARNING
Hazard Statement: H315: Causes skin irritation H319: Causes serious eye irritation.
Precautionary Statement: P364: Wash skin thoroughly after handling. P280: Wear Protective gloves/eye protection / face protection. P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P305+P351+P338: IF IN EYES: Rinse Cautiously with water for several minutes. Remove contact lenses if present and easy to do so. Continue rinsing. P332 + P313: If skin irritation occurs: Get medical advice / attention. P337 +P313: If eye irritation: Get medical advice / attention. P362: Take off contaminated clothing and wash before reuse. 

Potential Effects: Eye: Risk of serious damage to eyes.	Skin: Harmful in contact with skin. 
Ingestion: Harmful if swallowed. 	Inhalation: Harmful by inhalation. 
2.3: Other Hazards: none

3. COMPOSITION / INGREDIENTS: 
Chemical 					CAS No.		Percent		Hazardous
Pyrocatechol violet                                                  	115-41-3         	 ~ 100%                       No 

4. FIRST AID: Eyes: Rinse with water as precaution. 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 and supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH, & full PPE. Water mist may be used to cool closed containers. Extinguishing: Use dry chemical, CO2, water spray or alcohol resistant foam.  
Hazards:  Carbon oxides, sulfur oxides

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section8. 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 only in a well-ventilated area. Minimize dust generation and accumulation. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Wash contaminated clothes/shoes. Storage: Keep container closed when not in use. Store in a cool, dry, well-ventilated area away from incompatible substances.  Store protected from moisture. 

8. EXPOSURE: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low. 
Chemical                                ACGIH                        NIOSH                   OSHA – Final/Vacated PELs 
Pyrocatechol Violet              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: A respiratory protection program that meets OSHA’s 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator’s use.  

9. PHYSICAL & CHEM:  Appearance: Dark Green crystalline powder Melting Pt: 185°C Solubility: 1 g/l 

10. STABILITY & REACTIVITY: Stability: Stable under normal temps/pressures. Avoid: Incompatibles, dust generation, excess heat, exposure to moist air or water. Incompatibilities: Strong oxidizing agents, moisture. Haz Decomp: see section 5

11. TOXICOLOGICAL INFO: RTECS#: unlisted. LD50/LC50: N/a. 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 regulations to ensure complete and accurate classification. RCRA p-Series: None listed. RCRA U-Series: None listed. 

14. TRANSPORT REGULATIONS: No info. 

15. REGULATORY INFO: SARA 311/312: none
Section 302 (RQ) & Section 302 (TPQ) None of the chemicals in this material or products have an RQ or TPQ. 
Section 313 No chemicals are reportable under Section 313. 

STATE CAS# 115-41-3 is not present on state lists from CA, MN, MA, FL. 
PA Right to Know: Catechol Violet  CAS#115-41-3	NJ Right to Know: Catechol violet  CAS#115-41-3
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: C 	WGK (Water Danger/Protection) CAS# 115-41-3: No information available. 
Canada - DSL/NDSL CAS# 115-41-3 is listed on Canada’s DSL List. 
Canada – WHMIS: This product has a WHMIS classification of E. 

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.