Chloromethyl mercury

  • Caspan
  • Methylmercury monochloride
  • Mercurymethylchloride
  • Methylmercuric chloride
  • Methylmercury chloride
Formula
CH3ClHg
Structure
Description
White microcrystals or crystals.

Registry Numbers and Inventories.
CAS
115-09-3
EC (EINECS/ELINCS)
204-064-2
RTECS
OW1225000
RTECS class
Tumorigen; Drug; Organometallic; Mutagen; Reproductive Effector
UN (DOT)
2025
Beilstein/Gmelin
3600218
Beilstein Reference
4-04-00-04436
Swiss Giftliste 1
G-6577
Austrailia AICS
Listed
Korea ECL
Listed

Properties.
Formula
CH3ClHg
Formula mass
251.08
Melting point, °C
175
Vapor pressure, mmHg
0.0085
Density
3.83 g/cm3

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.
Stability
No data.
Incompatibilities
Sensitive to light.

Fire.
Fire fighting
Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher.
Fire potential
Non-Combustible
Hazards
Flash point data for this chemical are not available; however, it is probably nonflammable.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Carcinogin
I-2B, CP65
Poison_Class
1
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.
   Skin
Avoid any skin contact. See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. IMMEDIATELY call a physician and be prepared to transport the victim to a hospital even if no symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. IMMEDIATELY call a hospital or poison control center even if no symptoms (such as redness or irritation) develop. IMMEDIATELY transport the victim to a hospital for treatment after washing the affected areas.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
2025
Response guide
Hazard class
6.1
Packing Group
I; II; III