Woman working in the perfume business
Question

                What is the ruling on a woman selling perfumes in trade fairs and shopping centres to which men and women go?

And selling perfumes and bakhoor (incense) to men and women, and burning bakhoor in the store constantly so as to attract customers, when it is possible that some of the fragrance may get onto her, such as the bakhoor and perfumes that she is offering for sale?.
Praise be to Allah.
      There is 
      nothing wrong with a woman working in buying and selling, so long as she 
      adheres to proper Islamic etiquette in her dress, speech and dealings. 

    In the early 
    days of Islam, women used to buy and sell in a modest and reserved manner, 
    and none of the scholars objected to that. 

    In Fataawa 
    al-Lajnah al-Daa’imah (17/13), it says: 

    It is 
    permissible for her (a woman) to go to the marketplace to buy and sell, if 
    she needs to do so, and if she covers her entire body in clothes that do not 
    show her shape, and she does not mix freely with men. But if she does not 
    need to engage in that buying and selling, then it is better for her not to 
    do that. End quote. 

    But if a 
    woman’s engaging in trade will lead to her uncovering that which Allah has 
    forbidden her to uncover, such as her face, or to her travelling without a 
    mahram, or to her mixing with non-mahram men in a manner that it is feared 
    will lead to fitnah, then it is not permissible for her to do that; rather 
    she should not do it. End quote. 

    Fataawa 
    al-Lajnah al-Daa’imah, 
    13/16 

    For a woman to 
    work in a perfume shop, selling to men, exposes her to fitnah and may 
    encourage foolish men to approach her. 

    There is 
    nothing wrong with a woman selling perfume and bakhoor so long as she is 
    careful not to let any of the fragrance get onto her, because of the warning 
    against women wearing perfume in front of non-mahram men. See the answer to 
    question no. 102329. 

    And it is not 
    permissible for her to burn bakhoor in her shop to attract customers, 
    because the fragrance of the bakhoor will undoubtedly get onto her, and the 
    Prophet (blessings and peace of Allah be upon him) said: “Any woman who has 
    got the fragrance of bakhoor on her should not attend ‘Isha’ prayer with 
    us.”

    Narrated by 
    Muslim, 444. 

    If the woman 
    who is going to the mosque is forbidden to use perfume and bakhoor, then how 
    about the one who is sitting in the marketplace to buy and sell, where men 
    will inevitably smell the fragrance of bakhoor from her? 

    So it is 
    better for that woman, if she needs to work, to limit it to selling to women 
    only, so that she will not mix with men. 

    And Allah knows best.