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Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

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Sulphuric Acid on the Web

Introduction
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Introduction
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DKL Engineering, Inc.

Handbook of Sulphuric Acid Manufacturing
Order Form
Preface
Contents
Feedback

Sulphuric Acid Decolourization
Order Form
Preface
Table of Contents

Process Engineering Data Sheets - PEDS
Order Form
Table of Contents

Introduction

Bibliography of Sulphuric Acid Technology
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Preface
Contents

Sulphuric Acid Plant Specifications
 

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Properties - Sulphuric Acid
September 27, 2003

Introduction Associated Links

Cloudiness
Colour
Acid Quality


Introduction

Sulphuric acid is a colourless to amber, slightly cloudy, oily liquid with a specific gravity almost twice that of water.  At normal temperatures and a concentration of 98% or lower, it has little odour.  At higher temperatures and above a concentration of 98% irritating sulphur trioxide (SO3) fumes may be liberated.  Oleum (fuming sulphuric acid) is a colourless to white, heavy, oily liquid containing sulphur trioxide dissolved in sulphuric acid.  On exposure to air, oleum releases irritating white fumes of sulphur trioxide.

All grades of sulphuric acid have an affinity for water resulting in evolution of heat when diluted.  In the case of oleum, the reaction occurs with explosive violence.  Sulphuric acid and oleum will absorb moisture from the air resulting in dilution of the acid.  All grades are strongly corrosive and personal safety precautions should be carefully followed.

Many organic substances, wood, starch, sugar, paper, etc. are charred on contact with sulfuric acid, forming carbon.  Very small quantities of organic matter will blacken sulphuric acid as a result of suspended carbon.

Colour Clear, colourless liquid
Contaminants in the acid may impart a colour to the acid.
Reactivity Sulphuric acid will attack many metals and in its concentrated form is a strong oxidizing agent and may cause ignition on contact with organic materials, nitrates, carbides, chlorates, etc.
Flash Point None
Structure H2so4.gif (853 bytes)
h2so4mol.JPG (7097 bytes)
Specific Gravity Varies with concentration and temperature.   See Table  See Chart
Freezing Point See Table  See Chart
Boiling Point See Table  See Chart
Viscosity See Chart
Conductivity See Chart
Enthalpy See Chart

 

 

 

 

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