Carbon Black Storage and Handling: A Safety Guide

Carbon black is not classified as a hazardous substance; however, it is a fine powder material, and its storage and handling require care for both product quality and workplace safety.

Protecting product quality

Moisture is the first enemy

Carbon black absorbs moisture. In material that has picked up moisture, the heating loss value (ASTM D1509) rises above the standard limit of 1%, and the following problems appear: bubbles in extrusion, craters on the surface, voids in masterbatch and a drop in mechanical values.

The precaution is simple: store it in a closed, dry area, keep the packaging on pallets off the floor, and close the opening of an opened jumbo bag.

Temperature and sunlight

In packaging left in direct sunlight, the internal temperature rises and condensation can form. PP packaging material also weakens over time under UV, creating a risk of tearing during transport.

Stacking

Stacking beyond the strength limit of the packaging crushes the bags at the bottom and turns pellets into dust. Broken pellets raise the fines content (ASTM D1508) and cause feeding problems.

Workplace safety

Dust control

Pelletized carbon black greatly reduces dust generation but does not eliminate it. Provide local ventilation at discharge and feeding points, and prefer closed feeding systems.

Personal protective equipment

• Dust mask (during handling and discharging)
• Safety glasses
• Gloves and long-sleeved workwear
• Washing with soap and water after skin contact

Static electricity

Static charge can build up when powder is transferred in a dry environment. Grounding the equipment and not letting humidity fall too low is recommended.

Fire

Carbon black is not readily flammable; however, if it stays at high temperature for a long time, it can smolder. Store it away from heat sources. In case of fire, use water mist or dry chemical powder; a pressurized water jet is not recommended because it would lift the dust into the air.

Safety data sheet (SDS)

Every business that works with chemical substances is legally required to keep an up-to-date safety data sheet for each substance it uses. The SDS covers hazard classification, first aid measures, storage conditions and disposal methods.

We send the safety data sheets for our products on request; we recommend obtaining them before your first order.

Disposal

Unused product and packaging must be disposed of in line with local waste regulations. Empty jumbo bags are usually recyclable; kraft paper bags are a paper-PE composite and are handled separately.