Definition

1. Noun:
   • Animal charcoal / Bone black: A fine, black powder produced by the carbonization (charring) of animal bones in the absence of air. It is a form of charcoal primarily used as a pigment, a filtering agent, or a decolorizing agent.

Usage Examples

• Noun:
  • Than xương được dùng để lọc đường trong công nghiệp thực phẩm. (Animal charcoal is used to filter sugar in the food industry.)
  • Màu đen từ than xương rất bền. (The black color from bone black is very durable.)
  • Họ sản xuất than xương từ phế phẩm của các lò mổ. (They produce animal charcoal from slaughterhouse waste.)

Advanced Usage

• Technical/Industrial Context: In chemistry and manufacturing, "than xương" specifically refers to activated bone char, which has a high surface area and is used for purifying solutions by adsorbing impurities.
  • Than xương hoạt tính có khả năng hấp phụ chất màu rất tốt. (Activated bone char has excellent color adsorption capabilities.)

Variants and Related Words

• Than hoạt tính (n): Activated charcoal (a more general term, often made from wood or coconut shells).
• Than củi (n): Charcoal (typically made from wood).

Synonyms

• Bone black
• Animal charcoal
• Bone char

Notes on Usage

• "Than xương" is a technical and industrial term. In everyday conversation, the more general term than (charcoal) is used.
• It is distinct from common charcoal (than củi) as its source material and primary applications are different.