ROSOLIC ACID 

Safety Data Sheet
Emergency Telephone Number: CHEMTREC 1-800-424-9300       For Information call: DUDLEY 732-886-3100       
      DUDLEY CORPORATION
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Effective Date: January 1, 2025	
1. PRODUCT: Syn:  4-[Bis(p-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one  , Aurin     CAS No.: 603-45-2
	E-C No.:210-041-8	Weight:  290.31g/mol 	Formula: C19H14O3

2. HAZARDS: 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

Potential Health 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 / INFO: 
Chemical Name							 CAS No.	 	Percent		
4-[Bis(p-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one	                  603-45-2 		ca.100%                  

4. FIRST AID: Eyes: Rinse with plenty of 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 and supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSDS/NIOSH & full protective gear. 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 Haz: Carbon oxides
Extinguishing: Use water spray, dry chemical, carbon dioxide, or alcohol-resistant foam. 

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 PPE Section. Avoid generating dusty conditions. Provide ventilation. 

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

8. EXPOSURE CONTROLS / PPE: 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 Name			ACGIH			NIOSH		OSHA-Final / Vacated PEL’s
 Rosolic Acid.      			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 clothing to prevent skin exposure. 0.11 mm 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: Red to brown powder

10. STABILITY & REACTIVITY:  Avoid: Incompatibles, dust generation, excess heat. 
Stability: Stable at room temperature in closed containers under normal storage and handling conditions. 
Incompatibilities: Strong oxidizing agents. 	Hazardous Decomp. Products: see section 5

11. TOXICOLOGICAL INFO: RTECS#: unlisted.   LD50/LC50: Not available. 
Carcinogenicity: CAS# 603-45-2: Not listed by ACGIH, IARC, NIOSH, or OSHA. 

12. ECOLOGICAL INFO: Environmental Fate/Toxicity: No data 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: Not regulated.

15. REGULATORY INFO: SARA 311/312: None
Section 302 None of the chemicals in this product have a TPQ/RQ.  
Section 313 No chemicals are reportable under Section 313
STATE;  CAS#603-45-2 is not present on state lists from CA, MN, MA, FL. 
Pennsylvania Right to Know:	4-[Bis(p-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one	CAS#603-45-2
New Jersey Right to Know: 4-[Bis(p-hydroxyphenyl)methylene]cyclohexa-2,5-dien-1-one	CAS#603-45-2
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
Hazardous Symbols:  Not available.	WGK (Water Danger/Protection)CAS#603-45-2:  No information available.
Canada – DSL/NDSLCAS#603-45-2 is  listed on Canada DSL list
Canada – WHMIS: Not available.  CAS#603-45-2 is not listed on Canada’s Ingredient Disclosure List.

16. OTHER INFO: DUDLEY CORPORATION provides the information contained 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 product. 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 express or implied, including without limitation any 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.