HYDROCHLORIC ACID ANALPURE®

Importance of the topic

Maintaining the highest purity of hydrochloric acid is essential across analytical laboratories, quality control environments and industrial processes. Impurities can compromise reaction outcomes, interfere with analytical determinations and introduce contamination in sensitive applications such as semiconductor manufacturing or trace metal analysis. A detailed certificate of analysis documents the product’s compliance with strict quality criteria.

Study overview

This certificate of analysis for HYDROCHLORIC ACID ANALPURE®, batch 2060, provides a comprehensive profile of the product’s physical appearance, assay strength and levels of key contaminants. The document confirms the expiry date, colour metric, assay percentage and concentrations of halides, total sulphur, phosphorus and a wide range of trace metal impurities.

Methodology and instrumentation

Although specific instrumentation details are not stated, standard procedures in determining hydrochloric acid purity typically include:

• Acid–base titration for assay determination.
• Colorimetric or titrimetric methods for free and total halides.
• Inductively coupled plasma techniques (ICP-OES or ICP-MS) for quantifying trace metal impurities down to sub-ppb levels.

Main results and discussion

The assay of the hydrochloric acid was confirmed at 35 % w/w. Colour measurements fell below the 7 APHA threshold, indicating minimal organic or particulate content. Key anions and impurities showed:

• Bromide and free chlorine below 10 ppm and 0.5 ppm respectively.
• Total sulphur and phosphorus under 0.3 ppm and 0.01 ppm.

Trace metals analysis revealed all monitored elements—ranging from aluminium, arsenic and lead to rare earths and noble metals—were detected below the specified maximum concentrations, often below the method detection limits (e.g. < 0.1 ppb).

Benefits and practical applications

Such a high-purity reagent ensures:

• Reliable and reproducible analytical results in titrations, metal digestions and pH adjustments.
• Minimal background interference in spectroscopy or chromatographic methods.
• Compatibility with sensitive manufacturing processes in electronics, pharmaceuticals and material science.

Future trends and potential applications

Advancements in trace-level detection continue to lower quantification limits and expand the use of ultra-pure acids for emerging fields such as nanotechnology and advanced battery materials. Further improvements may include real-time monitoring of impurity profiles and integration with digital lab management systems.

Conclusion

The presented certificate confirms that HYDROCHLORIC ACID ANALPURE® batch 2060 meets or surpasses stringent purity specifications. The exceptionally low levels of halides, sulphur, phosphorus and trace metals make this reagent a reliable choice for a broad spectrum of high-precision analytical and industrial applications.