A considerable knowledge of metallurgy has been exhibited in a third-century AD text called Arthashastra which provides ingredients of explosives (Agniyoga) and salts extracted from fertile soils and plant remains (Yavakshara) such as saltpetre/nitre, perfume making (different qualities of perfumes are mentioned), granulated (refined) Sugar.
ɐ kənsˈɪdɚɹəbəl nˈɑːlɪdʒ ʌv mɛtˈælɜːdʒi hˈæzbiːn ɛɡzˈɪbɪɾᵻd ɪn ɐ θˈɜːdsˈɛntʃɚɹi ˌeɪdˈiː tˈɛkst kˈɔːld ˈɑːɹθɐʃˌæstɹə wˌɪtʃ pɹəvˈaɪdz ɪŋɡɹˈiːdiənts ʌv ɛksplˈoʊsɪvz ˌæɡnɪjˈoʊɡə ænd sˈɔlts ɛkstɹˈæktᵻd fɹʌm fˈɜːɾəl sˈɔɪlz ænd plˈænt ɹᵻmˈeɪnz jˌævɐkʃˈɑːɹɹə sˈʌtʃ ɐz sˈɔltpɛɾɚ slˈæʃ nˈaɪɾɚ, pˈɜːfjuːm mˌeɪkɪŋ dˈɪfɹənt kwˈɔlᵻɾiz ʌv pˈɜːfjuːmz ɑːɹ mˈɛnʃənd, ɡɹˈænjʊlˌeɪɾᵻd ɹᵻfˈaɪnd ʃˈʊɡɚ.