Entegris NOWPak Ultra 4 Liter 4000mL Lab Chemical Dispense Container ATMI

Entegris NOWPak Ultra 4 Liter 4000mL Lab Chemical Dispense Container ATMI

The Entegris NOWPak Ultra is a 4 liter (4000mL) closed-loop chemical dispense container designed for safe storage and delivery of process chemicals in semiconductor fabrication and laboratory environments. The container features a rigid orange HDPE outer shell with an integrated molded carry handle, a white threaded inner fitment, and a red protective cap. Originally developed and patented by ATMI Packaging, Inc. — now part of Entegris — the NOWPak Ultra system allows chemicals to be dispensed from the bottom of the liner without air ingress, reducing contamination risk and chemical exposure.

Specifications & What's Included

• Brand: Entegris (formerly ATMI Packaging, Inc.)
• Product line: NOWPak Ultra
• Capacity: 4 liter / 4000mL
• Outer body material: HDPE (high-density polyethylene), orange/amber
• Inner fitment: White threaded liner fitment for closed-loop dispense
• Cap: Red molded dust/closure cap (included)
• Carry handle: Integrated molded side handle on outer shell
• Patent numbers (per cap marking): 331625, 5,031,601, 5,102,010, 5,335,821, 5,435,460
• Condition: New, unused
• Includes: Container with inner fitment and red cap — no chemical contents

Applications

The NOWPak Ultra system was developed specifically for the semiconductor industry, where ultrapure process chemicals — photoresists, etchants, developers, CMP slurries, and other specialty chemicals — must be delivered to process tools with minimal contamination and zero operator exposure. The closed-loop, bottom-dispense liner design means the chemical is pushed out by the collapsing liner rather than poured, eliminating air contact and preventing cross-contamination. This makes NOWPak containers a standard in cleanroom chemical delivery systems at wafer fabrication facilities. They are also used in analytical labs, chemical research environments, and any setting where controlled, contamination-free chemical dispensing is required. The 4 liter size is one of the most common NOWPak volumes and fits a wide range of compatible dispensing cabinets and pump systems.