RHODIZONIC ACID DISODIUM SALT
	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: Rhodizonic Acid, Disodium Salt, P.A.  EC-No.: 208-340-3  CAS No.:  523-21-7   Weight: 214.04	                                   Formula: C6O6Na2 

2. HAZARDS ID: GHS:  Not a hazardous substance or mixture.
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.COMPOSTION / INFO:
Chemical		    	   	CAS No. 	            	 Percent	                  Hazardous
Rhodizonic Acid Disodium salt       	523-21-7                       98%		      No

4. FIRST AID: Eyes: Rinse with plenty of water as precaution. Skin: Rinse with plenty of soap & water.
Ingestion: Do not induce vomiting without medical advice. Rinse with water. Consult physician.
Inhalation: Move to fresh air.  Consult a physician. Physician: Treat symptomatically and supportively. 

5. FIREFIGHTING: 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 sodium oxides.

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section 8. Spill/Leaks: Clean up spills immediately, observing precautions in the PPE Section. Sweep up or vacuum, then place into suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

7.  HANDLING & STORAGE: Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Do not get in eyes, on skin, or on clothing. Do not ingest or inhale. Minimize dust generation and accumulation. Storage: Store in a tightly closed container. Store in a cool, dry, well-ventilated area.

8. EXPOSURE: Facilities storing or utilizing this material should be equipped with an eyewash facility. Use adequate ventilation to keep airborne concentrations low.

CHEMICAL NAME	
ACGIH	
NIOSH	
OSHA – FINAL/ Vacated PELs	

Rhodizonic Acid Disodium Salt	
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. 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 EN149 must be followed whenever workplace conditions warrant a respirator use.

9.  PHYSICAL & CHEM: Appearance: Gray-green to dark green powder Melting Pt: >300 deg C 

10. STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Avoid: Incompatibles, dust generation, excess heat, strong oxidants. Incompatibilities: Oxidizing agents  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 data available.

13.  DISPOSAL CONSIDERATIONS: Chemical waste generators must determine whether a discarded chem is classified as a hazardous waste. U.S. 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 information. 
RCRA P-Series:  None listed RCRA U-Series:  None listed

14.  TRANSPORT INFO: Not dangerous goods

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

STATE is not present on state lists from CA, MN, MA, FL. 
PA Right to Know: Disodium 3,4,5,6-tetraoxocyclohex-1-en-1,2-ylene dioxide  CAS#523-21-7
NJ Right to Know: Disodium 3,4,5,6-tetraoxocyclohex-1-en-1,2-ylene dioxide  CAS#523-21-7California 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:  Not available. WGK (Water Danger/Protection) CAS#523-21-7: Not available.
Canada – DSL/NDSL CAS#523-21-7 is listed on Canada’s DSL List.
Canada –WHMIS:  Not available.  CAS#523-21-7 is not listed. 

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.