What reagent grades, purity labels and specifications mean: ACS/AR, HPLC, electronic grade and tag-grade proteins, in 190+ guides from Aladdin Scientific.
Atomic absorption (AA), inductively coupled plasma (ICP-OES/ICP-MS), ion chromatography (IC), and total organic carbon (TOC) are core techniques for trace/ultratrace analysis and water-system evaluation. They are highly sensitive to “blank signal,” “method compatibility,” and the ...
Plant cell/tissue culture is highly sensitive to formulation impurities, oxidative by-products, and microbial contamination. Trace metals, residual organic solvents, peroxide in gelling agents, pH drift, and photodegradation can all cause callus induction failure, reduced organogenesis ...
Ultra-dry grade reagents are products that are qualified for extremely low water content, typically in the single‑ to tens‑of‑ppm range at release (e.g., ≤20–50 ppm for many solvents; some salts are supplied as rigorously anhydrous solids). Because there’s no single global standard, ...
“Optical glass grade” ( is a supplier-defined quality label for solid inorganic raw materials (typically high-purity oxides and halides) intended for melting optical glasses or depositing optical thin films. The emphasis is on ultra-low, color-forming metal impurities (Fe, Co, Ni, Cu, ...
Superconductor grade" refers to reagents such as salts, oxides, organometallic/metal–organic precursors, and powders, which are specifically manufactured and quality-controlled for the preparation of superconducting materials and devices. The emphasis is on:
“Pesticide residue grade” (often labeled for pesticide residue analysis, PRA) refers to solvents and auxiliaries produced and QC-tested specifically to minimize background signals and interferences when measuring trace-level pesticide residues—typically by GC-ECD, GC-MS(/MS), or ...
In China’s reagent system, “Spectrum pure” (SP) is a purpose-specific purity class used for spectroscopy. The label appears in the national classification standard GB/T 37885-2019 “Chemical reagent—Classification” as one of the recognized categories alongside high-purity, primary ...
SFA is a supplier-designated grade for reagents intended for general analytical use. Products labeled SFA are tested against a defined panel of quality attributes (assay/purity plus limits on key impurities) so they do not introduce significant analytical error in common methods (titrations, wet ...
“Semiconductor-grade” (often called Electronic Grade) refers to chemicals formulated and verified for microelectronics manufacturing, with ultra-low metallic ions, anions, particles, organics/TOC and extractables — typically controlled at ppb to ppt levels depending on the chemical and the ...