Preface

People usually ignore what is meant to be normal to them.  This is the same as for food additives.  We usually do not bother what is being added into our food as long as it is delicious.  However, different food additives have different health effect on human health.  This report is going to focus on food colouring and its impact on human health and its social importance.

Table of Contents _                                                                        Page

List of Figures and Tables                                                                3

  1. Introduction                                                                        4        History of azo dyes                                                                5

  1. Chemical part of the topic                                                                
  1. Coupling Reaction                                                        5
  2. The Molecular Structure of Azo Dyes                                        7

  1. Advantages and Disadvantages of Azo Dye
  1. The Application of Azo Dye                                                8
  2. The Downside of Azo Dyes                                                9

  1. Current development of azo dye around the world
  1. Food Act 1983 (Act 281) & Regulations in Malaysia                        11
  2. Types of banned azo dyes in major industrialised countries                11

  1. Conclusion                                                                        12

Bibliography                                                                                13

Appendix I                                                                                14

References

List of Figures and Tables                                                                Page

Figure 1: The History Development of Azo Dye                                          5

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Figure 2.1.1: The products of reaction between (1) diazonium ion and

phenol (2) diazonium ion and 2- naphthol        6      

Table 2.1.2: Structures of Azo Dye and Its Properties        6                

Figure 2.2.1: Tartrazine        7        

Figure 2.2.2: Brilliant Black        7

Table 3.1.1: Use of Azo Dyes in Different Industries        8

Figure 3.1.2: Azo dyes are present in cosmetics and candies        9

Table 3.2: Types of Azo Dyes and Their Related Health Effects        10

Table 4: Countries and the Azo Dyes Banned        11

  1.  Introduction

Azo dyes are compounds that give bright and ...

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