What is Vat Blue 18 Navy Blue BR CAS 1324-54-5?

Vat Blue 18, also called C.I. Vat Blue 18 or C.I. 59815, is a high-fastness vat dye with CAS 1324-54-5. It is supplied as a dark blue or navy powder and is also known as Vat Navy Blue BR, Vat Blue GCD, or trichloroisoviolanthrone.

How does Vat Blue 18 compare with standard Indigo for workwear?

Vat Blue 18 generally provides better resistance to industrial washing and chlorine bleaching than standard Indigo. This makes it a preferred choice for durable navy workwear, uniforms, and other textiles that undergo harsh laundering.

What vatting conditions are recommended for Vat Blue 18?

Vat Blue 18 is reduced with sodium hydrosulfite in an alkaline bath, typically with caustic soda. Depending on the commercial grade and dyeing method, reduction is usually carried out in a warm or hot range around 50-60 C.

What fastness levels can be expected from Vat Blue 18?

Vat Blue 18 is known for excellent light fastness, often around grade 6-7, and good washing fastness, commonly around grade 4-5. It also offers very good chlorine fastness, especially after proper oxidation and soaping.

Vat Blue 18 (Navy Blue BR) CAS 1324-54-5

Vat Blue 18, also called C.I. Vat Blue 18, C.I. 59815 or Vat Navy Blue BR, CAS 1324-54-5, is a high-fastness vat dye supplied for textile dyeing and printing. Confirm the required shade, strength and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 1324-54-5
Synonyms: Vat Blue GCD, Trichloroisoviolanthrone, Vat Navy Blue BR, C.I. Vat Blue 18
Einecs: 215-378-4
Molecular Formula: C₃₄H₁₃Cl₃O₂
Grade: Textile printing and dyeing chemicals
Package: 25kg/bag (Plastic woven bag with PE liner) or 500kg/1000kg Jumbo Bag.

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Product Description

Vat Blue 18 CAS 1324-54-5 is a high-fastness vat dye, also known as C.I. Vat Blue 18 or C.I. 59815, with molecular formula C34H13Cl3O2, molecular weight about 559.35 and EINECS 215-378-4.

Synonyms: Vat Blue GCD; Trichloroisoviolanthrone; Vat Navy Blue BR; C.I. Vat Blue 18; C.I. 59815.

CAS: 1324-54-5.

It has the molecular formula C34H13Cl3O2 and a molecular weight of about 559.35 g/mol.

It appears as a dark blue to navy powder.

It is reduced with sodium hydrosulfite in an alkaline bath, typically with caustic soda, during vatting.

It is mainly used for cotton and cotton textiles, including direct printing, resist printing and discharge printing.

It can also be applied to selected cellulosic blends in appropriate processes.

Compared with standard indigo, it provides better resistance to industrial washing and chlorine bleaching for workwear.

It offers excellent light fastness, often around grade 6–7, and good washing fastness around grade 4–5.

Its high fastness makes it suitable for uniforms, workwear and other demanding textile applications.

Formulators should match the dye strength and shade to the target fiber and vatting conditions.

Store in a cool, dry, well-ventilated area in tightly closed containers away from strong oxidizers.

Protect from moisture and direct sunlight to maintain shade and strength consistency.

Confirm appearance, shade, strength, moisture, heavy metals and residual solvent limits as required.

Use dust masks or respirators and eye protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended use, required shade, strength and specification, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Vat Blue 18 Navy Blue BR CAS 1324-54-5?

A: Vat Blue 18, also called C.I. Vat Blue 18 or C.I. 59815, is a high-fastness vat dye with CAS 1324-54-5. It is supplied as a dark blue or navy powder and is also known as Vat Navy Blue BR, Vat Blue GCD, or trichloroisoviolanthrone.
Q:
How does Vat Blue 18 compare with standard Indigo for workwear?

A: Vat Blue 18 generally provides better resistance to industrial washing and chlorine bleaching than standard Indigo. This makes it a preferred choice for durable navy workwear, uniforms, and other textiles that undergo harsh laundering.
Q:
What vatting conditions are recommended for Vat Blue 18?

A: Vat Blue 18 is reduced with sodium hydrosulfite in an alkaline bath, typically with caustic soda. Depending on the commercial grade and dyeing method, reduction is usually carried out in a warm or hot range around 50-60 C.
Q:
Which fibers can be dyed with Vat Navy Blue BR?

A: It is mainly used for cotton and cotton textiles, including direct printing, resist printing, and discharge printing. It can also be applied to viscose, silk, and cotton-blend fabrics where high wet fastness is needed.
Q:
What fastness levels can be expected from Vat Blue 18?

A: Vat Blue 18 is known for excellent light fastness, often around grade 6-7, and good washing fastness, commonly around grade 4-5. It also offers very good chlorine fastness, especially after proper oxidation and soaping.

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