METHYL ORANGE

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:  4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt, Acid Orange 52, Helianthin, Orange III  CAS No.: 547-58-0 	  E-C No.:208-925-3       Weight:  327.33g/mol 	Formula: C14H14N3NaO3S

2. HAZARDS ID: GHS: Acute toxicity, Oral (Category 3)	 
 Pictogram: 				                        
Signal Word:         DANGER
HAZARD STATEMENT(S): H301: Toxic if swallowed.		
PRECAUTIONARY STATEMENT(S):  P264: Wash skin thoroughly after handling.	
P270: Do not drink, eat, smoke, when using this product. P405: Store locked up. P330: Rinse mouth.
P301 + P310: If swallowed: Immediately Call Poison Center or doctor/physician 
P321: Specific treatment (see supplemental first aid instructions).
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: 
Chemical Name						 CAS No.	 	Percent		
Sodium 4-(4-dimethylaminophenylazo)benzenesulphonate		 547-58-0  	100% 

4. FIRST AID: Eyes: Rinse with water. Skin: Rinse with soap & water. Ingestion: Do not induce vomiting without medical 
advice. Rinse with water. Inhalation: Move to fresh air.  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. Vapors may be heavier than air. They can spread along the ground and collect in low or confined areas. Hazards: Carbon, nitrogen, sulfur & sodium oxides. Extinguishing: Use water spray, dry chemical, CO2, or alcohol-resistant foam. 

6. ACCIDENTAL RELEASE: Info: Use proper PPE as indicated in Section 8.  Spills: Clean up spills immediately, observing precautions in the PPE Section. Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions. Provide ventilation 

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with skin and eyes. Keep container tightly closed. Do not ingest or inhale. Storage: Store in a cool, dry, well-ventilated area away from incompatibles. Keep containers tightly closed. 

8. EXPOSURE / PPE: Use adequate ventilation to keep airborne concentrations low.  ACGIH/NIOSH: None listed OSHA - Final / Vacated PELs: 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 respirators use. 

9. PHYSICAL & CHEM: Appearance: Orange crystalline powder pH: 6.5 at 5g/l at 20°C Melting Pt.: >300°C pH: 

10. STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Avoid: Incompatibles, excess heat. Incompatibilities: Strong oxidizing agents. Haz Decomp: see section 5

11. TOXICOLOGICAL INFO: RTECS#: DB6327000 LD50/LC50: Oral, rat: LD50 = 60 mg/kg; 
Carcinogenicity: Not listed by ACGIH, IARC, NIOSH, NTP, or OSHA. Mutagenicity: Histidine reversion, morphological transformation, unscheduled DNA transformation.

12. ECOLOGICAL INFO: 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: 
D.O.T.: UN 3143, Dyes, solid, toxic, n.o.s. (methyl orange), 6.1, III, ERG 151

IMDG: UN 3143, DYE, SOLID, TOXIC, N.O.S. (methyl orange), 6.1, III, ERG 151	

IATA: UN 3143, Dye, solid, toxic, n.o.s. (methyl orange), 6.1, III,

15. REGULATORY INFO: SARA 311/312:  Acute Health Hazard.
Section 302 (RQ) & (TPQ) None of the chemicals in this material have an RQ or TPQ. 
Section 313 No chemicals are reportable under Section 313. 
STATE CAS# 547-58-0 is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know: Sodium 4-(4-dimethylaminophenylazo)benzenesulphonate  CAS#547-58-0
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: T  	WGK (Water Danger/Protection) CAS# 547-58-0: 2 
Canada - DSL/NDSL CAS# 547-58-0 is listed on Canada’s DSL List. 	Canada - WHMIS: Not available. 
Canadian Ingredient Disclosure List  CAS# 547-58-0 is listed on the Canadian 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.