Gas Detector Knowledge Gas Understanding: Arsenic (AsH3)

Chemical identity
● Product Name: Arsenic ● Chemical Molecular Formula: AsH3
● Alias: Arsenic, trihydrogen arsenide, hydrogen (III) arsenide, etc. ● Application: General industry

[composition/composition information]

Concentration is nominal. For the exact concentration of the mixture, refer to the technical specifications.

【Overview of dangers】
Emergency summary
● Inhalation can be fatal.
● Extremely flammable liquefied gas.
● May form explosive mixtures with air.
● Vapors may spread and ignite over long distances.
● When mixing with air at a concentration above the lower combustion limit (LFL), there is a direct risk of fire and explosion.
● Avoid breathing gas.
● Direct contact with liquid can cause frostbite.
● Self-contained breathing apparatus (SCBA) may be required.
Potential health hazards
● Inhalation: Possible lethal poisoning caused by low concentrations. Exposure to a concentration of 250 ppm can be fatal within minutes. May be fatal if inhaled.
● Eye contact: Contact with liquid may cause cold burns/frosts sting.
● Skin contact: Contact with liquid may cause cold burns/frosts sting.
● Ingestion: Ingestion is not considered a potential route of exposure.
● Chronic Health Hazards: Repeated exposure can lead to anaemia, numbness, or end tingling and heart damage.
Exposure guidelines
● The main invasive route: Inhalation.
● Target organs: May damage the respiratory system, central nervous system, and liver.
● May cause kidney and liver damage.
● Symptoms: Headache, nausea, tingling, numbness, delayed onset of symptoms, vomiting. Inhalation may cause the following symptoms: red urine, skin bronze.
Exacerbated illness
● Individuals with anemia or congenital kidney, heart, liver or central nervous system diseases are at increased risk of asthma.
environmental impact
● Harmful to the environment.

【first-aid】
General advice: In all cases of overexposure, prompt medical attention is required. Wear a self-contained breathing apparatus to move the patient to a non-contaminated area. Warm and rest for the patient. Get medical attention. If breathing stops, use artificial respiration.
● Skin contact: Avoid breathing vapors if the skin comes into contact with liquid products. Remove contaminated clothing and rinse with plenty of cold water for at least a few minutes. Rinse the frozen area with plenty of water. Do not take off your clothes. Use a sterile dressing to wrap the wound.
● Eye contact: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Eyes widen when flushing.
● Ingestion: Ingestion is not considered a potential route of exposure.
● Inhalation: Move to fresh air. If breathing stops or is difficult, give artificial respiration. May require supplemental oxygen. If the heartbeat stops, CPR should be performed immediately by trained personnel. If you are short-term, give oxygen. Get medical attention.
Doctor's Information
● Treatment: May cause acute vascular hemolysis and subsequent kidney failure. Bronze skin, may be confused with jaundice. The elevated T-wave of the electrocardiogram may be manifested in the intracellular release of potassium into the plasma. Poisoning treatment should be based on hemolysis and results. Hemodialysis, peritoneal dialysis, and exchange infusions should be considered, and consultation with qualified renal specialists should be conducted whenever possible.

【Fire-fighting measures】
● Suitable Extinguishing Media: All known extinguishing media can be used.
● Special hazards: There is no pressure safety device for the cylinder containing this product. The gas is heavier than air and may condense or stick to the place where the ignition source exists. If the flame is accidentally extinguished, an explosive reactivation may occur. Therefore, appropriate protective measures should be taken (for example, full evacuation to prevent people from being injured by cracked cylinder fragments and toxic fumes). When exposed to high heat or flames, the cylinders quickly drain and/or violently explode. Burning by-products may be toxic. Keep away from the cylinder and spray it from a protected location to cool it. Cool adjacent cylinders with plenty of water until the flames burn out. It is forbidden to let the fire water enter the drain or water channel. If possible, shut off the air supply and let the flames burn out. Fire only when airflow is blocked. It is forbidden to extinguish a leaked gas flame unless absolutely necessary. Natural/explosive reburning may occur. Fight all other fires.
● Special protective equipment for firefighters: Wear self-contained breathing apparatus.

[Leakage emergency treatment]
● Personal precautions: Evacuate personnel to a safe area. Eliminate all ignition sources. When the gas concentration in the area is unknown or exceeds the exposure limit, use a self-contained breathing apparatus or a positive-pressure tube respirator with a face mask and escape kit. It is forbidden to enter other areas where the enclosed space or the concentration of flammable gas exceeds the lower explosion limit by 10%. Unless it can prove air safety, wear self-contained breathing apparatus. Increase ventilation in the operating area.
● Environmental precautions: It should not be released into the environment. Prevent continued leakage or spillage while ensuring safety. Prevent access to sewers, basements and work pits, or any other place where hazardous accumulation may occur.
● Cleaning methods: Increase the ventilation of the operating area. Close to suspected leakage areas should be careful. Evacuate the site and remove all ignition sources until all leaked liquid has evaporated (no frost on the floor).
● Other suggestions: Large spills may require considerable downwind evacuation. If possible, stop the delivery of the product. Increase ventilation in the leak area and monitor the concentration. If you are leaking from a cylinder or cylinder valve, call the Air Products emergency telephone. If leaks occur in the customer's system, the cylinder valve should be closed before attempting repair, safely vented, and purged with inert gas.

[Operation and Storage]
Disposal
● The preferred metals for processing niobium are carbon steel, stainless steel, Monel-nickel alloy, Hastalloy. Kel-F and Teflon are the preferred elastomers. Viton and nylon are suitable. The cylinders should be erected and stored with a valve guard and tightened to prevent tipping or overturning. Prevent physical damage to the cylinder. Do not tow, pull, roll or kick the cylinder. The temperature in the storage area must not exceed 50°C (122°). Only properly trained and experienced personnel can operate the compressed gas. Check the label for confirmation before use. Before use, you should know and understand the product's characteristics and dangers. If you have questions about how to operate a particular gas, consult your supplier. Do not remove or damage the label provided by the supplier to confirm the contents of the cylinder. When transporting cylinders, the trailers (carts, trolleys, etc.) are transported even at short distances. Be sure to cap the bonnet until the cylinder is fixed to the wall, ready for use on the shelf or in the equipment. Use an adjustable wrench with a wrench to open the tight or rusted bonnet. Before connecting the cylinders, pay attention to the following: The gas system is suitable, especially the pressure range and material. Before using the connection container, feedback from the system to the container is prohibited. Ensure that the entire gas system is compatible with the pressure rating and structural materials. Before use, make sure that the entire gas system has been checked for no leakage. When the gas is released into the system at a lower pressure level than the vessel, a suitable pressure regulator is used. Do not insert anything into the bonnet (eg, wrench, screwdriver, crowbar, etc.). Doing so can damage the valve and cause a leak. Slowly open the valve. When users encounter any difficulties with the cylinder valve, stop using it and contact the supplier. Even if it is connected to the device, close the valve after each use and after it is empty. Do not attempt to repair cylinder valves and pressure relief devices. If the valve is damaged, report the supplier immediately. The valve should be closed after each use and when empty. After removing the cylinder from the equipment, the outlet plug should be replaced as soon as possible. Do not subject the cylinder to abnormal mechanical vibration, as it may damage the valve and pressure relief device. Do not attempt to use a valve cap to lift the cylinder. Cylinders can only be used as containers for gases and cannot be used as rollers, supports or other uses. Do not re-compress the arc on the gas cylinder or make it part of the circuit. Do not smoke when handling gas or cylinders. Do not recompress the gas before consulting the supplier. Do not try to transfer gas from one cylinder to another. Use anti-reverse devices on the pipeline. Air is purged out of the system before the gas is introduced. It is recommended to set cross cleaning components between the cylinder and the regulator. Valve outlet plugs should be installed when returning the cylinder. Do not use open flame or electric heating equipment to increase the pressure inside the container. The container temperature must not exceed 50°C (122°). Should be avoided below -30°C (-20°) for long periods. It is forbidden to attempt to increase the liquid withdrawal rate by pressurization before contacting the supplier. It is forbidden to allow liquefied gas to be trapped in a part of the system, as this may cause hydraulic rupture. All piping systems and associated equipment must be grounded.
store
● The cylinders should be stored in well-ventilated buildings, preferably open to the atmosphere. The storage of all containers should be set to "first-in, first-out". Obey all local regulations on container storage. Check the condition of the container regularly and check for leaks. Local regulations may have special requirements for the storage of toxic gases. Do not store in open air to prevent rust and extreme weather. Do not store cylinders in environments that may accelerate corrosion. The cylinders should be stored upright and the bottle body should be fixed to prevent tipping. Close the valve and install the appropriate outlet cap (Cap) or outlet plug (Plug). Container bonnet or protective device to be installed in place. Keep containers tightly closed in cool, well-ventilated areas. Store containers in areas where there is no risk of fire and keep them away from heat and sources of ignition. Full and empty cylinders should be isolated. Avoid storage temperatures exceeding 50°C (122°). Smoking is strictly forbidden when storing products or handling products or containers. Set the "No smoking or open flame" mark in the storage area. The amount of flammable or toxic gas stored should be kept to a minimum. Return empty bottles promptly. The place where flammable substances are stored should be separated from oxygen and other oxidants by at least 20 feet (6.1 meters), or separated by at least 5 feet (1.5 meters) high non-combustible material barrier, and fireproof time of at least 1/2 hour . Technical/Preventive Measures Containers should be stored in categories classified according to local regulations (eg, flammable, toxic, etc.). Provide adequate air exchange and/or exhaust in the workplace.

[contact control/personal protection]
● Engineering control: The product can only be handled in a sealed system or with proper mechanical ventilation. Provide appropriate natural or explosion-proof ventilation to ensure that the concentration is below the exposure limit.
Personal protective equipment
● Respiratory protection: Keep self-contained breathing apparatus handy for emergency use. When the gas concentration in the area is unknown or exceeds the exposure limit, use a self-contained breathing apparatus or a positive-pressure tube respirator with a face mask and escape kit. Personnel using respirators must be trained.
● Hand protection: It is recommended to use safety gloves when handling cylinders. The penetration time of the selected glove must be greater than the predetermined period of use.
● Eye protection: It is recommended to use safety glasses when handling cylinders. When connecting, cutting or opening cylinders, wear full face masks in addition to safety glasses.
● Skin and body protection: Low temperatures may cause embrittlement of the protective material, resulting in breakage and direct contact. Contact with cold evaporated liquid on gloves or clothes may result in low temperature burns or frostbite. It is recommended to use safety shoes when handling cylinders. Suitable for wear: flame retardant protective clothing.
• Specific instructions for sanitary protection: Provide good ventilation and/or local exhaust to prevent accumulation of concentrations above the exposure limit. Ensure adequate ventilation, especially in confined areas.
Exposure limits

[Physical and Chemical Properties]
● Status: Liquefied gas.
● Color: colorless.
● Odor: Poor odor warning at low concentrations. Garlic-like smell.
● Molecular weight: 77.95 g/mol
Relative vapor density: 2.691 (air = 1)
● Relative density: 1.6 (water = 1)
● Steam pressure: 217.55 psia (15.00 bar), 68? (20°C)
● Density: 0.206 lb/ft3 (0.0033 g/cm3), 70° (21°C)
● Note: (by vapor meter)
● Specific volume: 4.91 ft3/lb (0.3065 m3/kg), 70° (21°C)
● Boiling point/boiling range: -80? (- 62.2°C)
● Critical temperature: 222? (105.4°C)
● Melting point/melting range: -178? (-116.9°C)
● Auto-ignition temperature: 545? (285°C)
● Upper explosion limit: 77.8% (V)
● Lower explosion limit: 3.9% (V)
● Water solubility: 0.778 g/l

Stability and Reactivity
● Stability: Stable under normal conditions.
● Conditions to avoid: heat, open flame, and sparks.
● Incompatible materials: oxidants. oxygen. Hazardous decomposition products: Arsenic and hydrogen are decomposed at about 232°C (450°C)
[toxicology information]
Acute health hazards
● Ingestion: The product itself has no useful information.
● Inhalation: LC50 (1 hour): 178 ppm
● Type: Mouse ● Skin: The product itself has no useful information.
Chronic health hazards
● Earthworms are extremely toxic gases that can destroy red blood cells and cause widespread organ damage. It is a strong reducing agent and has a strong affinity for hemoglobin in the blood. Red blood cell hemolysis can cause kidney failure. The destruction of red blood cells causes hemoglobin and its degradation products in plasma and urine. Jaundice is also the main manifestation of hemolysis. The most serious manifestation of sputum poisoning is renal impairment and possible loss of function. Permanent damage, especially to the central nervous system and even fatal results, is also well-proven.

[ecological data]
Ecotoxicological effects
● Water toxicity: The product itself has no useful information.
● Toxicity to other organisms: No relevant information available.
Sustainability and degradability ● Liquidity: No relevant information available.
Bioaccumulation: The product itself has no useful information.
● Other information: Toxic to aquatic organisms.

Disposal
● Residual/unused products: Incineration followed by scrubbing is a commonly used disposal method. Observe local and national regulations. If you need guidance, contact the supplier. Return the unused product to the supplier with the original cylinder. Do not release into the atmosphere.
● Contaminated packaging: recycled by the supplier.

【Transport information】
● CFR
The correct shipping name: 胂 Rank: 2.3 (2.1)
UN/ID number: UN2188
● IATA
The correct shipping name: 胂
UN/ID number: UN2188
● IMDG
The correct shipping name: 胂 Rank: 2.3 (2.1)
UN/ID number: UN2188
● CTC
The correct shipping name: 胂 Rank: 2.3 (2.1)
UN/ID number: UN2188
● Other information: Avoid transporting vehicles that are not separated from the driver's cab through loading space. Make sure the driver understands the potential hazards and knows what to do in an emergency.

【Regulatory Information】
Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (29CFR1910.1200) Hazard Levels ● Highly Toxic ● Flammable ● Compressed Gases

EPA SARA Title III, Section 312 (40CFR370) Risk Classification
● Acute health hazards ● Chronic health hazards ● Fire hazards ● Risk of sudden release of pressure

EPA SARA Title III, Section 313 (40CFR 372) Component (s) above' de minimus' level
● 胂 California Safe Drinking Water and Toxic Enforcement Act (Recommendation 65)
● Warning! This product contains a carcinogenic chemical known to California.
胂
【other information】
NFPA level
● Health hazards: 4
● Flammability: 4
● Instability: 2
HMIS level
● Health hazard: 4*
● Flammability: 4
● Physical hazards: 2