40nm Standard Gold Nanoparticles
https://www.reg4all.org/shop/g-40-20-1000-ml-40nm-standard-gold-nanoparticles-77810
https://www.reg4all.org/web/image/product.template/77810/image_1920?unique=5ccb42e
High-quality for use in scientific research, chemical synthesis, and laboratory applications. Available in G-40-20-1,000 ml size. CAS: Unknown
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