MERCURIC IODIDE 

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: CAS No.: 7774-29-0 	E-C No.:231-873-8 Weight:  454.40g/mol 	Formula: HgI2

2. HAZARDS ID: GHS Classification: Acute aquatic toxicity (Category 1) Acute toxicity, Oral (Category 2)	 
Chronic aquatic toxicity (Category1) Acute toxicity, Inhalation (Category2) Acute toxicity, Dermal (Category1)
Specific target organ toxicity - single exposure (Category 2)
 Pictogram: 				         
Signal Word:         DANGER
HAZARD STATEMENT(S): H300+H310+H330: Fatal if swallowed, in contact with skin or if inhaled. 	
H373: May cause damage to organs through prolonged or repeated exposure.	
H410: Very toxic to aquatic life with long lasting effects.
PRECAUTIONARY STATEMENT(S): P260: Do not breathe dust/fume/gas/mist/vapors/spray. P262: Do not get in eyes, on skin, or on clothing. P264: wash skin thoroughly after handling P270: Do not drink, eat, smoke, when using this product. P271: Use only outdoors or in a well-ventilated area. P273: Avoid release into environment P310: Immediately Call Poison Center or doctor/physician P280: Wear protective gloves/eye & face protection P284: Wear respiratory protection P330: Rinse mouth P301 + P310: If Swallowed: Immediately Call Poison Center or doctor/physician P405: Store locked up. P302 + P350: If on skin gently wash with plenty of soap & water. P362; Take off & wash all contaminated clothing. P304 + P340: If inhaled: remove to fresh air and keep at rest in a position comfortable for breathing.
P391: Collect spillage.  P403 + P233: Store in a well-ventilated place. Keep container tightly closed.
P501: Dispose of contents/container to an approved waste disposal plant.

HMIS Classification: Health hazard  4, Flammability   0,  Physical hazards   0			
NFPA Rating: Health hazard  4, Fire     0, Reactivity hazard   0
2.3: Other Hazards: none

3. COMPOSITION / INFO: 
Chemical Name					 CAS No.	 	Percent		
Mercury di-iodide  				7774-29-0  	100% 

4. FIRST AID: Eyes: Rinse immediately with plenty of water for 15 min and seek medical advice. 
Skin: Rinse with plenty of soap & water and seek medical advice. Ingestion: Do not induce vomiting without medical advice. Rinse with water. Consult physician. Inhalation: Move to fresh air.  Consult a physician.  Physician: Treat symptomatically & supportively. 

5. FIRE FIGHTING: Info: Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH, & full PPE. Combustion generates toxic fumes. Special Hazards:  Hydrogen iodide, mercury 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: 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. Do not let this product enter drains; entrance into the environment should be avoided. 

7. HANDLING & STORAGE: Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Do not ingest or inhale. Store protected from light. 
Storage: Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Poison room locked. Light sensitive. 

8. EXPOSURE CONTROLS / PPE: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate general or local explosion-proof ventilation to keep airborne levels to acceptable levels. 
Chemical Name               ACGIH                       		NIOSH                         	OSHA -Final PELs
Mercuric Iodide                0.025 mg/m3 TWA         	0.05 mg/m3 TWA	       	0.1 mg/m 3 Ceiling               
                              
 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 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 29CFR 1910.134 or European Standard En 149. Always use a NIOSH or European Standard En 149 approved respirator when necessary. Hygiene: Avoid contact with skin, eyes and clothing. Wash hands before breaks and immediately after handling the product.

9. PHYSICAL & CHEM: Appearance: Red-dark red powder Boiling Pt: 354°C (669˚F) at 1,013hPa Melting Pt: 259˚C (498.2 ° F)  Solubility: soluble. Relative Density: 6.36 g/cm3 Bulk Density: 6.28g/l

10. STABILITY & REACTIVITY: Stability: Stable under normal temp/pressures. Avoid: High temperatures, incompatibles, light, dust generation, excess heat. Incompatibilities: Strong oxidizing agents, chlorine trifluoride, potassium, sodium, light. Hazard Decomp: see section 5

11. TOXICOLOGICAL INFO: RTECS#: OW5250000. LD50: Oral, mouse: Oral, rat: = 18 mg/kg; Skin, rat: 75 mg/kg; Carcinogenicity: Not listed by ACGIH, NIOSH, NTP, or OSHA. IARC Group 3- not classified carcinogenicity humans
Teratogenicity: TCLo=4870ng/m3/24H; Extra-embryonic structures, inhalation-rat TCLo=450 ng/m3/24H; Fetotoxicity, inhalation-rat TCLo=450ng/m3/24H. Reproductive Effects: Fertility: Post-implantation mortality, inhalation-rat TCLo=4870ng/m3/24H. Other Studies: Stomach irregularities

12. ECOLOGICAL INFO: Fate:  Not readily biodegradable.  Toxicity: Very toxic to aquatic life with long-term adverse effects in the aquatic environment.

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: UN 1638, Mercury iodide, 6.1, II, ERG 151
IMDG: UN 1638, MERCURY IODIDE, 6.1, II		IATA: UN 1638, Mercury iodide, 6.1, II	
 
15. REGULATORY INFO: SARA 311/312:  Acute Health Hazard, Chronic Health Hazard.
Section 302 (RQ) & Section 302 (TPQ) None of the chemicals in this material/product have an RQ or TPQ. 
Section 313 This material contains Mercuric Iodide (listed as Mercury compounds), ca 100%, (CAS# 7774-29-0) which is subject to the reporting requirements of section 313 of SARA Title III and 40 CFR Part 373.
STATE CAS# 7774-29-0 is not present on state lists from CA, MN, FL.
MA Right to Know: CAS# 7774-29-0:  Mercury diiodide Rev. 3/1/07
PA Right to Know: CAS# 7774-29-0:  Mercury diiodide Rev. 3/1/07
NJ Right to Know: CAS# 7774-29-0:  Mercury diiodide Rev. 3/1/07
California Prop.65 components: WARNING: This product contains a chemical known to the State of CA to cause birth defects or other reproductive harm CAS# 7774-29-0:  Mercury diiodide Rev. 3/1/07

EUROPEAN/INTERNATIONAL REGULATIONS European Labeling in Accordance with EC Directives 
Hazardous Symbols:  T+   N   WGK (Water Danger/Protection) CAS# 7774-29-0: 3. 
Canada - DSL/NDSL CAS# 7774-29-0 is listed on Canada’s DSL List. 
Canada - WHMIS This product has a WHMIS classification of D1A, D2B. 
Canadian Ingredient Disclosure List CAS# 7774-29-0 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.