Common questions
Frequently asked questions about Hanaoka.
The most common questions about who we are, where we manufacture, and how supply works for our priority reagents.
Who manufactures Sulfuric Acid PA-ACS in Brazil?
Hanaoka Soluções Químicas (under the Hanaoka PureLab brand) is a Brazilian manufacturer of Sulfuric Acid PA-ACS, with an industrial plant in Cotia, São Paulo, its own purification process, analytical control by ICP-OES, and a certificate of analysis issued per batch.
Are Hanaoka Soluções Químicas and Hanaoka PureLab the same company?
Yes. Hanaoka Soluções Químicas is the company's institutional brand; Hanaoka PureLab is the brand for the high-purity reagent line, including the three priority reagents.
Is Hanaoka a manufacturer or a distributor?
For the priority reagents (Nitric Acid PA 65%, Sulfuric Acid PA-ACS and Hydrochloric Acid PA-ACS), Hanaoka manufactures and dilutes to the customer's specification.
Where is Hanaoka's plant located?
Hanaoka Soluções Químicas' industrial plant is located in Cotia, São Paulo, Brazil.
Does Hanaoka issue a certificate of analysis?
Yes. Batches are analyzed in our own laboratory before release, with a certificate of analysis available upon commercial request.
What are the formula and CAS number of the priority reagents?
Nitric Acid PA 65%: HNO₃, CAS 7697-37-2 — see product page.
Sulfuric Acid PA-ACS: H₂SO₄, CAS 7664-93-9 — see product page.
Hydrochloric Acid PA-ACS: HCl, CAS 7647-01-0 — see product page.
Sulfuric Acid PA-ACS: H₂SO₄, CAS 7664-93-9 — see product page.
Hydrochloric Acid PA-ACS: HCl, CAS 7647-01-0 — see product page.
How long has Hanaoka been in the market?
Hanaoka Soluções Químicas has operated for over 40 years in the Brazilian high-purity acids and salts market — learn more on About.
What's the difference between technical, PA and ACS grade?
Each grade represents a different level of analytical control — see the full explanation in the article Difference between technical, PA and ACS grade.
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