1. Low expansion: The coefficient of thermal expansion is low, enabling it to withstand rapid temperature changes without being prone to cracking.
2. High inertness: It is resistant to the corrosion of multiple chemical reagents, guaranteeing the accuracy of experiments.
3. Transparency: It facilitates the observation of the liquid state within the flask.
4. Standard orifice: The size of the standard Ground Glass Joint conforms to international standards, fits closely with accessories, and has excellent sealing properties.
5. Flask structure: It is conducive to liquid mixing, stirring, and reactions, and enables controlled flow rate and volume when pouring.
6. Graduations: They are integrally fired, durable, and convenient for estimating the liquid volume.

Working Environment Conditions:
1. High Temperature Resistance: The maximum working temperature is +500°C, and it can endure short-term operations of less than 10 hours. A ceramic gauze should be placed beneath during heating.
2. Low Temperature Resistance: The minimum service temperature can reach -70°C. Sudden temperature variations should be avoided.
3. Chemical Corrosion Resistance: It can tolerate most acids, alkalis, salts and other chemical reagents. However, prolonged exposure to strong alkalis may have an impact.
4. Avoid Contact with Specific Substances: Such as highly corrosive substances like hydrofluoric acid.

Precautions:
1. Uniform Heating: Use a ceramic gauze during heating and increase the temperature slowly.
2. Avoid Collision: Handle gently and operate smoothly.
3. Pressure Control: Prevent excessive pressure inside the bottle.
4. Timely Cleaning: Select appropriate detergents based on the residue.
5. Thorough Drying: Air dry or oven dry, with temperature control.
6. Appropriate Storage: Place in a dry, clean and well-ventilated location and avoid stacking.