METHYL RED FREE ACID ACS 

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: Syn: C.I. Acid Red 2; 2-(4-Dimethylaminophenylazo) benzoic acid; C.I. 13020; p-(Dimethylamino)- azobenzene-o-carboxylic acid; Methyl Red. CAS No.: 493-52-7 Weight: 269.30 Formula: C15H15N3O2 EC No.: 207-776-1

2. HAZARDS:  GHS Class:  Acute aquatic hazard (Cat 2)
Hazard Statement: H401: Toxic to aquatic life. 
Precautionary Statement: P273: Avoid release into the environment. P501: Dispose of contents/container to an approved waste disposal plant. 

HMIS Class: Health hazard  0, Flammability   0,  Physical hazards   0			
NFPA Rating: Health hazard  0, Fire     0, Reactivity hazard   0
2.3: Other Hazards: none

3. COMPOSITION / INFO: 
Chemical 				 CAS No.	  	Percent		Hazardous
Methyl Red                                                   493-52-7                  98%                            No 

4. FIRST AID:  Eyes: Rinse with water as precaution. Skin: Rinse with soap & water Ingestion: Do not induce vomiting w/o medical advice. Rinse with water. Inhalation: Move to fresh air.  Physician: Treat symptomatically & supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus if necessary Special Hazards: Carbon & nitrogen oxides, combustible. 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: Clean up spills immediately, observing precautions in the PPE Section. Sweep up, then place into a suitable container for disposal. 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. Avoid ingestion and inhalation. 
Storage: 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 a safety shower. Use adequate ventilation to keep airborne concentrations low. 

Chemical                      ACGIH                 	NIOSH                    OSHA –Final/Vacated PELs 
Methyl Red                   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: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

9. PHYSICAL & CHEM: Appearance: Dark red to purple to maroon powder Melting Pt: 179-182 °C  Partition coefficient: n-octanol/water: low POW:3.9 using QSAR. Solubility: slightly soluble Density: 0.989g/cm3

10. STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Materials containing similar functional groups can decompose at elevated temps. Avoid: Dust generation, excess heat. Incompatibilities: Strong oxidizing agents. Haz Decomp: see section 5

11. TOXICOLOGICAL INFO: RTECS#: DG8960000.	LD50/LC50:  N/A. 
Carcinogenicity: Not listed by ACGIH, NIOSH, NTP, or OSHA.  IARC Group 3 – no carcinogenicity to humans
Mutagenicity: Histidine reversion (ames) unscheduled DNA analysis.

12. ECOLOGICAL INFO: LC50: Mosquito fish – 7mg/l – 96h  Toxic to aquatic life with long lasting effects.

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: DOT: UN3077, Environmentally hazardous substance, solid, n.o.s., 9, III
IMDG & IATA: not hazardous  

15. REGULATORY INFO: SARA 311/312: None
Section 302 (RQ) & Section 302 (TPQ) None of the chemicals in this material/product have a RQ or TPQ. 
Section 313 No chemicals are reportable under Section 313. 
STATE CAS# 493-52-7 is not present on state lists from CA, MN, MA, FL. 
PA & NJ Right to Know:  2-(4-Dimethylaminophenylazo)benzoic acid  CAS#493-52-7
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 
Hazard Symbols: Not available.  WGK (Water Danger/Protection) CAS# 493-52-7: 2 
Canada - DSL/NDSL CAS# 493-52-7 is listed on Canada’s DSL List. 
Canada – WHMIS: This product has a WHMIS classification of  NOT controlled. 

16. DISCLAIMER 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.