The chemical reagent cabinet is an important facility used in laboratories for the safe storage of chemical reagents. Its standardized use directly affects the safety of laboratory personnel, the stability of reagents, and environmental protection. The following provides detailed explanations on reagent classification, storage standards, operational details, safety protection, emergency response, and daily maintenance, aiming to provide systematic guidance for laboratory personnel.

1、 Classification and zoning storage of reagents

1. Classify by nature

-Flammable and explosive substances (such as ethanol and acetone) should be stored in explosion-proof cabinets or metal cabinets, away from heat and fire sources.

-Corrosive substances (such as sulfuric acid and sodium hydroxide): Store separately in anti-corrosion trays or plastic cabinets to avoid contact with metals.

-Toxic substances (such as mercury and arsenic compounds): Strictly isolate, and the cabinet should be equipped with ventilation openings or exhaust devices.

-Oxidizing and reducing reagents (such as potassium permanganate, sodium permanganate): Store separately to prevent mixing and triggering violent reactions.

-Volatile reagents (such as concentrated hydrochloric acid): Store in a cool and sealed place, and the cabinet should have ventilation design.

2. Partition identification

-The cabinet should be clearly divided into areas and labeled with categories such as "acidic", "alkaline", "organic solvents" to avoid confusion.

-High risk reagents (such as highly toxic and explosive substances) need to be locked and managed, and warning signs (such as skull icons and flame icons) should be posted.

2、 Storage specifications and operational details

1. 容器要求

-Reagents must be stored in their original sealed form, and unlabeled or damaged containers are prohibited. Glass bottles need to be protected with plastic secondary containers to prevent breakage and leakage.

-Volatile or corrosive liquids should be sealed with screw caps or rubber plugs to prevent evaporation or leakage.

2. Storage principle

-Compatibility: Avoid storing reagents that react with each other adjacent to each other (such as acids and bases, oxidants and reducing agents).

-Stability: Sensitive reagents (such as silver nitrate) should be stored in brown bottles or dark cabinets; Reagents that are prone to decomposition when exposed to moisture (such as sodium metal) need to be isolated from air by adding an inert medium (such as kerosene).

-Load bearing limit: Heavy reagents are stored on the bottom layer, and lightweight items are placed on the top layer to prevent the cabinet from overturning.

3. Temperature and humidity control

-The storage temperature for ordinary reagents should be 15-25 ℃, and the humidity should be below 70%. High temperature reagents (such as benzene) need to be refrigerated, and reagents that are prone to crystallization at low temperatures (such as calcium chloride) need to be stored at room temperature.

-The cabinet should be kept away from the heating and air conditioning vents to avoid local temperature differences that may cause reagent deterioration.

3、 Operating standards and safety protection

1. Access process

-Personal protection: Wear goggles, gloves (choose nitrile, rubber or PVC material according to the nature of the reagent), and laboratory clothing.

-Pre opening inspection: Confirm that the cabinet door is tightly closed and the ventilation system is functioning properly.

-Three step extraction method:

-Observation label: Check the reagent name, concentration, and expiration date to avoid misuse.

-Handle with care: Do not drag the bottle to prevent it from breaking due to vibration.

-Seal as needed: Immediately seal the bottle cap after removal, and do not return excess reagents to the original bottle.

2. Tool usage

-Use specialized tweezers or shovels to remove solid reagents and avoid direct hand contact.

-When pouring liquid, tilt the bottle body 45 degrees and slowly flow along the container wall to prevent splashing.

3. Taboo behaviors

-Eating, smoking, or using electronic devices such as mobile phones are prohibited near the reagent cabinet.

-It is forbidden to expose unsealed reagents outside the cabinet for a long time to prevent volatilization or moisture absorption.

4、 Emergency response and accident prevention

1. Leakage treatment

-Liquid leakage: Immediately cover and clean with absorbent materials (such as sand, cotton yarn), and treat corrosive liquids with neutralizing agents (such as sodium bicarbonate neutralizing acid solution).

-Dust leakage: Gently sweep into a sealed container to avoid dust.

-After cleaning, the contaminated area needs to be wiped with cleaning agent and ventilated.

2. Fire response

-When flammable reagents catch fire, immediately use dry powder fire extinguishers or carbon dioxide fire extinguishers, and it is strictly prohibited to use water to extinguish the fire.

-Quickly close the cabinet door to isolate oxygen, but be cautious to prevent the risk of explosion.

3. Personnel protection

-When skin comes into contact with highly corrosive reagents, immediately rinse with plenty of water for at least 15 minutes and seek medical attention.

-When the reagent splashes into the eyes, use an eye wash to continuously rinse and call for first aid.

5、 Daily maintenance and inspection

1. Regular inventory check

-Verify the integrity, expiration date, and storage status of reagent labels on a monthly basis, and promptly remove expired or deteriorated reagents.

-Establish an inventory ledger to record the names, quantities, purchase dates, and user information of reagents.

2. Equipment maintenance

-Check the sealing of the cabinet and the smoothness of the ventilation holes to ensure that the explosion-proof film, door locks, and other components are intact.

-Check the accuracy of the temperature and humidity sensors inside the cabinet once a year, clean the filter screen and fan.

3. Training and drills

-New employees need to receive training on the use of reagent cabinets, familiarize themselves with the hazardous characteristics and emergency measures of various chemicals.

-Organize a fire or leak drill every quarter to strengthen practical response capabilities.