Sulfuric acid 10% (v/v), 1 gallon. A ready-made working-strength acid for sample acidification, digestion, cleaning, and methods that specify 1+9 acid.

Sulfuric Acid 10% (v/v) Solution, 1 Gallon

$93.00

What it is. This sulfuric acid solution is a 10% (v/v) dilution of concentrated sulfuric acid in water, supplied in a 1 gallon size. It is a clear, colorless working-strength acid for acidifying samples, cleaning, digestions, and method reagents that specify 10% sulfuric acid.
Normality versus molarity. Sulfuric acid releases two hydrogen ions per molecule, so its normality is twice its molarity. Concentrated sulfuric acid (95 to 98%) is about 18 M, so a 10% (v/v) solution is roughly 1.8 M, about 3.6 N (calculated). It is a convenient working strength that avoids handling concentrated acid for routine tasks.
A strong, non-oxidizing titrant at working strength. Dilute sulfuric acid behaves as a strong acid in titrations of bases. Unlike hydrochloric acid, it is not volatile, so standard solutions hold their strength well, and it is the preferred acid for permanganate titrations, where chloride would interfere.
Why buy it pre-diluted. Diluting concentrated sulfuric acid releases a great deal of heat and can spatter violently if water is added to acid. A ready-made 10% solution removes that hazard for routine work and gives consistent strength from batch to batch.
Method reagent. Many water, wastewater, and industrial methods specify sulfuric acid by volume ratio, such as 10% (v/v) or 1+9. Using a prepared solution keeps the reagent exactly as written in the method.
Cleaning and digestion. Dilute sulfuric acid removes mineral deposits, acidifies digests, and supports oxidation steps in sample preparation, where its non-volatile nature keeps acid strength stable during heating.
Handling at a glance. Even at 10%, sulfuric acid causes burns and corrodes metals. Wear goggles and acid-resistant gloves, store it in a corrosives cabinet, and add acid to water when diluting further.
Standardization. Verify concentration against a primary standard base such as dried sodium carbonate, using methyl orange or a mixed indicator, or against standardized sodium hydroxide with phenolphthalein.
Where it is used. Laboratories use 10% sulfuric acid for acidifying samples and digests, method reagents specified at 10% or 1+9, permanganate and dichromate titrations, cleaning and descaling, and preparing working acid solutions.

Technical Specifications

Chemical Name	Sulfuric acid, aqueous solution
CAS Numbers	7664-93-9 (sulfuric acid); 7732-18-5 (water)
EC Number (H2SO4)	231-639-5
Synonyms	Oil of vitriol (concentrated), battery acid (dilute), H2SO4 solution
Formula (active)	H2SO4
Molecular Weight (active)	98.08 g/mol
Equivalent Weight	49.04 (diprotic; normal = 2 x molar)
Concentration	10% (v/v)
Approximate Molarity	About 1.8 M (about 3.6 N), calculated from 18 M concentrate
Appearance	Clear, colorless liquid
Physical State	Liquid, aqueous solution
Exposure Limit (mist)	OSHA PEL and NIOSH REL: 1 mg/m³ TWA
Package Size	1 gallon

Applications / Common Uses

Sample acidification: Acidifies water and wastewater samples.
Method reagents: Supplies 10% (1+9) sulfuric acid as specified.
Redox titrations: Provides acid for permanganate methods.
Digestion: Acidifies digests during sample preparation.
Cleaning: Removes mineral deposits from equipment.

Storage, Handling & Shipping

Caution: 10% sulfuric acid causes skin and eye burns and is corrosive to metals. Wear chemical splash goggles and acid-resistant gloves, and always add acid to water when diluting further.

Store tightly closed in a corrosives cabinet away from bases, reactive metals, organic materials, and water-reactive substances. When diluting, always add acid slowly to water, never water to acid, since dilution releases heat.

Incompatible materials: Bases, reactive metals (release hydrogen), organic materials, oxidizers and reducers, and cyanides or sulfides.
Exposure limit (sulfuric acid mist): OSHA PEL and NIOSH REL: 1 mg/m³ TWA.
Spill response: Contain and neutralize with sodium bicarbonate or an acid spill kit, then rinse with water.
First aid: Skin or eyes: flush with water for at least 15 minutes and seek medical attention.
GHS signal word: Danger or Warning depending on concentration.
DOT / shipping: UN2796, Sulfuric acid, Class 8.

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