Hellmanex® III

The special cleaning concentrate from Hellma

Cuvettes serve as vessels for liquid or gaseous substances where the interaction of light is to be observed, examined or measured.

To ensure that these photometric measurements are not influenced by unknown impurities, the highest demands must be placed on the cleanliness of the cuvettes. The cleaning of cuvettes is of importance because of the need to remove residues completely, while protecting these delicate and high-quality optical parts as much as possible.


Product information

Article-No.: Description
9-307-011-4-507 Hellmanex® III, alkaline cleaning concentrate, for cleaning cuvettes made of Glass, Quartz and optical parts.
Quantity: 1.0 liter (1.4 kg)
LIMITED QUANTITY: UN 3266 CORROSIVE LIQUID, BASIC, INORGANIC, N.O.S. (TRIPOTASSIUM ORTHOPHOSPHATE); 8 ; III ; (E) Selling unit from factory: Box with 6 bottles of 1.0 L, total weight approx.: 9.3 kg
325.000 CleanAssist cell holder, plastic cell holder for 4 cells with 10 mm light path for cleaning purposes

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Hellmanex® III is a liquid alkaline concentrate for highly effective cleaning of cuvettes made of glass and quartz glass and other sensitive optical parts. In addition, laboratory equipment made of glass, quartz glass, sapphire and porcelain can be cleaned.


Hellmanex® III significantly reduces the surface tension of water. The Hellmanex aqueous solution helps with the removal  of dirt particles, and its high emulsifying and dispersing capabilities prevent the redeposition of the loosened particles. Special surface-active substances facilitate the residue-free rinsing of the optical components once they have been cleaned.

Hellmanex® III is low in phosphates. All organic active cleaning ingredients are over 80 % biodegradable according to the OECD guideline 302 B. This product complies with the most recent requirements for the reduction of environmental pollution. Highly corrosive and etching substances such as potassium hydroxide and chlorine were specifically replaced with cleaning agents that are gentle on materials and skin.

Hellmanex® III is a complete replacement for chromosulfuric acid. Furthermore, we specifically warn against the use of chromosulfuric acid on cells which contain materials other than quartz or glass (such as plastics or metals).

Hellmanex® III is filtered to 1 μm and is therefore virtually free of solid particles.

Cleaning and dilution

The optimal dilution depends on several factors, such as the hardness of the water, the degree and type of contamination, the temperature etc. The use of demineralized water improves the cleaning characteristics.


The following treatments have proved useful in practice:

Concentration (% by vol.) Temperature °C Time (minutes)
0.5 - 2 20-25 120-180
0.5 - 2 30-35 30-40
0.5 - 2 50-60 (quartz only) 10-15
0.5 - 2 70-80 (quartz only) 2-5

An increase in temperature speeds up the cleaning process. However, at high temperatures it is necessary to avoid thermal shock. The cells should be prewarmed before being submerged into hot cleaning solutions.


  • Wetting agents
  • Emulsifiers
  • Ampholytic
  • surface-active agents
  • Complexing agents
  • Potassium phosphate

The suitability of materials

A 2% solution of Hellmanex® III is suitable for use with glass, quartz, sapphire, porcelain, ceramics, plastics and ferrous metals. It can also be used with some limitations, on metals that are sensitive to corrosion such as aluminum and other nonferrous metals. In such cases, avoid prolonged application. In the case of materials not listed here, suitability tests should be carried out or enquiries directed to Hellma.

The concentrate can be stored in vessels made of chrome steel, PE, PP, PVC, FPM or NBR.

Physical Data

pH-values at 0.5 % : 11.6
  at 1.0 % : 11.8
  at 2.0 % : 12.0
Concentrate density 1.420 g/ml  
Surface tension at 1.0 % : 30.10 mN/m
Phosphate content P2O5 at 1.0 % :   0.92 mg/cm3


Certificate of Analysis

Hellmanex III Analysis Certificates stating measured analysis results for ph-value, density and conductivity per Lot number are available in the Download area.

Disposal regulations

This product complies with the international current regulations regarding biological Degradability (WRMG and tenside law). Used Hellmanex® III solutions should be neutralized to a pH-value of 7-8 before being discharged into the sewage system.


Hellmanex III (Dosing table)


Hellmanex III (Safety Data Sheet English- Germany)


TSE / BSE Declaration of Conformity Hellmanex III


Download Hellmanex III - Safety Data Sheet for USA


Hellma USA Inc.
120 Terminal Drive
11803 Plainview, NY
United States

Phone: +1 5169 3908 88


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