Proper storage of hydroxylamine hydrochloride is crucial for ensuring its quality and safety, making it an essential aspect of chemical management. This article will focus on the hydroxylamine hydrochloride storage conditions, shelf life, and safety precautions of hydroxylamine hydrochloride to help readers understand how to effectively store it and avoid potential hazards and losses. By employing the correct storage methods and strict safety measures, the stability and safety of hydroxylamine hydrochloride can be ensured, thus providing assurance for its applications in various fields.

Understanding Hydroxylamine Hydrochloride

Hydroxylamine hydrochloride, also known as hydroxylamine chloride or hydroxyammonium chloride, is a white crystalline substance that decomposes upon exposure to moisture. It is soluble in water, alcohols, and glycerol but insoluble in ether. With a molecular formula NH2OH·HCl and a molecular weight of 69.49 g/mol, it has a density of 1.67 g/cm3 and a melting point of 151°C. Hydroxylamine hydrochloride is highly hygroscopic, corrosive, toxic, and irritating to the skin, with a LD50 value of 408 mg/kg in mice. It is used as a reducing agent in organic synthesis to prepare oximes, in the dye industry to produce intermediates for indigo red, and as a raw material or intermediate in the synthesis of anticancer drugs and pesticides. Additionally, it serves as a deoxidizer, an analytical reagent for determining magnesium content in steel by electrochemical analysis, and for trace analysis of sulfonic acid and fatty acids, as well as for testing and analyzing aldehydes and ketones. It is also used as a developer for processing color films and as a non-staining short-stop agent in the synthetic rubber industry. Furthermore, in the fat industry, it is employed as an antioxidant and anti-aging agent for fatty acids and soaps. Due to its importance as a chemical raw material and organic synthetic intermediate with extensive applications, hydroxylamine hydrochloride is imported in large quantities by various countries annually, including China.

Physical and Chemical Properties

(1) Physical Properties

• Appearance: White crystalline solid
• Odor: Odorless
• Hydroxylamine Hydrochloride Melting Point: 151-153°C
• Hydroxylamine Hydrochloride Boiling Point: Decomposes at high temperatures
• Density: 1.67 g/cm3
• Solubility: Highly soluble in water and alcohols

(2) Chemical Properties

• Hydroxylamine Hydrochloride Molecular Formula: NH2OH·HCl
• Hydroxylamine Hydrochloride Molecular Weight: 69.49 g/mol
• pH: Acidic
• Reactant Species: Reducing agent

What are the storage conditions for hydroxylamine hydrochloride?

(1) Temperature and Environment

Optimal Storage Temperature: Hydroxylamine hydrochloride should ideally be stored in a cool environment. The recommended temperature is between 2-8°C (35-46°F). This helps minimize decomposition and maintains compound stability.

Environmental Conditions: The storage environment should be dry and well-ventilated. Avoid storing near heat sources or open flames.

(2) Humidity and Light Sensitivity

• Humidity Sensitivity: Hydroxylamine hydrochloride is sensitive to air and humidity. Exposure to moisture can lead to compound decomposition and release of harmful gases.
• Light Sensitivity: Although not as critical as moisture, prolonged exposure to light can also accelerate its degradation.

Therefore, storing hydroxylamine hydrochloride in tightly sealed containers is crucial to minimize exposure to air, moisture, and light.

What is the shelf life of hydroxylamine hydrochloride?

(1) Determining Factors

The shelf life of hydroxylamine hydrochloride is influenced by several factors:

• Light: Exposure to light causes hydroxylamine hydrochloride to decompose.
• Temperature: High temperatures accelerate decomposition.
• Moisture: Moisture promotes degradation.
• Air Exposure: Oxygen in the air can accelerate decomposition.
• Contamination: Impurities can act as catalysts, accelerating degradation.

(2) Storage Time

How long is the shelf life of hydroxylamine hydrochloride? Under ideal storage conditions, the shelf life of hydroxylamine hydrochloride can be up to 36 months. Proper storage conditions include: cool, dark environment (preferably below room temperature); sealed containers; and desiccants to absorb moisture.

Important Note: Refer to the Safety Data Sheet (SDS) from specific suppliers for recommended storage and handling methods. The above information provides general guidelines, and manufacturer recommendations may supersede it.

Safety Considerations

Hazards

If mishandled, hydroxylamine hydrochloride can be hazardous.

• (1) Hydroxylamine hydrochloride is corrosive and can cause irritation to the skin, eyes, and respiratory tract. Avoid direct contact with the compound.
• (2) Hydroxylamine hydrochloride is unstable and decomposes when exposed to heat or light. Store in a cool, dry, and dark place.
• (3) Hydroxylamine hydrochloride is a reducing agent and can react with oxidants such as bleach or hydrogen peroxide to produce toxic gases. Avoid mixing it with oxidants.
• (4) Hydroxylamine hydrochloride is flammable and can ignite when exposed to heat or flame. Keep away from heat sources and flames.

Safety Operation Precautions

Ensure the workplace is well-ventilated. Obtain special instructions before use. Do not operate before reading and understanding all safety precautions. Wear personal protective equipment. Do not inhale dust, fumes, gases, mists, sprays, or vapors. Avoid contact with eyes, skin, or clothing.

Hygiene Measures

Do not eat, drink, or smoke while using this product. Wash hands and other exposed areas thoroughly with mild soap and water before eating, drinking, or smoking and when leaving the work area. Contaminated clothing should be washed before reuse. Do not allow contaminated work clothes to leave the workplace. Wash hands after using this product.

Storage Containers and Handling

Storage Conditions:

Keep containers tightly sealed. Store in a well-ventilated area. Store in a dry place. Store in corrosion-resistant containers with corrosion-resistant liners. Keep in the original container.

Incompatible Materials

Metals

Container Materials

Suitable Materials

(1) Glass Containers: These are the preferred option for storing hydroxylamine hydrochloride. Glass is inert and effectively prevents exposure to moisture and air.

(2) Lined Metal Cans/Drums: Metal containers lined with compatible materials such as fluoropolymers (e.g., Teflon) or epoxy resin. The lining protects the metal from corrosion and prevents interaction with hydroxylamine hydrochloride.

Unsuitable Materials

• (1) Unlined Metal Containers: Direct contact with bare metal can cause corrosion and degradation of the compound. Avoid using containers made of aluminum, galvanized steel, or iron.
• (2) Standard Plastic Containers: Many plastics are incompatible with hydroxylamine hydrochloride. This compound can degrade plastics, leading to contamination and potential leaks.

Other Considerations

• (1) Container Seal: Ensure containers are tightly sealed to minimize ingress of air and moisture. Screw caps or gaskets are recommended.
• (2) Labeling: Clearly label containers with contents and hazard information

Conclusion

In conclusion, this article has summarized key points for storing hydroxylamine hydrochloride, including storage conditions, shelf life, and safety precautions. Proper storage methods are essential for ensuring the quality and safety of hydroxylamine hydrochloride. We emphasize the importance of following appropriate safety storage guidelines to effectively avoid potential dangers and risks. We encourage readers to take action, prioritize safety, and gain a deeper understanding of products containing hydroxylamine hydrochloride. By following correct storage guidelines and safety procedures, readers can better protect themselves and others and apply hydroxylamine hydrochloride more effectively in relevant fields.

References:

[1]https://fscimage.fishersci.com/msds/11280.htm

[2]https://www.lochemie.com/lab-chemical-msds/MSDS-HYDROXYLAMINE-HYDROCHLORIDE-CASNO-5470-11-04130-EN.aspx

[3]https://webapps.ilo.org

[4]https://chemicalsolution.ca/catalog/chemicals/hydroxylamine-hydrochloride

[5]https://cameochemicals.noaa.gov/chemical/20501

[6] Wang Yu. Preparation of attapulgite-supported titanium silicon molecular sieve and its application in the synthesis of hydroxylamine hydrochloride [D]. Huaiyin Institute of Technology, 2020. DOI: 10.27944/d.cnki.ghygy.2020.000041.