Background: Pueblo Chemical Depot has been storing mustard agent since the 1950s. This represents about 8.5% of the original U.S. chemical weapons stockpile. Pueblo's stockpile includes projectiles and mortar rounds.
Clear liquid when pure
Consistency of motor oil or molasses
Normally a yellow-brown color
Heavier than water as a liquid and heavier than air as a vapor
Mustard is a persistent agent
Mustard is a vesicant; can cause blisters
Designed to incapacitate personnel
Storage & Safety
Stored in earth-covered bunkers called igloos.
Igloos, constructed of concrete with reinforced steel, are 25 feet high, 25 feet wide, and 80 feet long.
The igloos are specifically designed to contain the weapons and protect them from damage caused by deterioration and weather-related events.
The chemical storage area is secured and monitored 24 hours a day, 7 days a week.
HD HT - Pueblo's Stockpile Consists of Two Types of Mustard HD & HT
HD is a sulfur mustard, distilled to remove impurities.
HD becomes a solid at 58º Fahrenheit and boils at 422° Fahrenheit.
HD is 1.27 times heavier than water, and 5.5 times heavier than air.
HT is a distilled mustard combined with a sulfur and chlorine compound.
HT becomes a solid at 34° Fahrenheit and boils at 442° Fahrenheit.
HT is 1.27 times heavier than water, and 6.9 times heavier than air.
Symptoms of Mustard Exposure
Burning or stinging of the eyes
Sore throat and hoarse cough
Burning, stinging, or redness of the skin
Skin blisters, appear on delicate tissues first
Ingestion can cause weakness, nausea, vomiting, and fever
2 to 24 hour delay before symptoms appear
Flush eyes and exposed wounds with clear water or saline only.
Remove contaminated clothing.
Flush skin with a 5% household bleach to water mixture followed by washing with soap and water.
If any of the symptoms appear, seek medical attention immediately.