1,4-Dipropionyloxybenzene

What is 1,4-Dipropionyloxybenzene?

1,4-Dipropionyloxybenzene (also known as Hydroquinone dipropionate), with the chemical formula C₁₂H₁₄O₄ and molecular weight 222.24, has the CAS number 7402-28-0. Physical properties vary: most literature describes it as a white crystalline powder (melting point: 112–114°C), while some suppliers list it as a colorless liquid, likely due to purity or solvent differences.

Applications:

(1) Whitening & Spot Reduction

• Tyrosinase Inhibition: Blocks the key enzyme in melanin synthesis, reducing skin pigmentation and effectively improving freckles, melasma, sunspots, and uneven skin tone.

• High Stability & Low Irritation: Its esterified structure overcomes the oxidation sensitivity and strong irritation of hydroquinone, offering enhanced safety for long-term use.

(2) Hair Care & Dye Enhancement

• Cross-Linking Agent: Fixes pigment molecules in hair dyes, improving color longevity and vibrancy.

• Emulsifying Action: Enhances the blending

Fuctions:

1. Cosmetics & Skincare

• Whitening Products: Added at 0.5–5% in serums/creams for spot lightening.

• Hair Products:

  • Permanent/semi-permanent hair dyes (boosts color retention)

  • Conditioners/styling products (emulsifying stabilizer).

2. Industrial Chemicals

• Polymers & Resins: Acts as a cross-linker to strengthen materials and improve weather resistance (e.g., coatings, engineering plastics).

• Plastics & Rubber: Functions as a plasticizer/stabilizer to enhance processing flexibility and product durability.

 💎1,4-Dipropionyloxybenzene COA generally includes the following test items and standards:

Parameter	Specification	Result
Appearance	White crystalline powder	Complies
Melting Point	112–114°C	113.2°C	1011
Purity (HPLC)	≥99.0%	99.5%	16
Water Content	≤0.5% (Karl Fischer)	0.12%
Density	1.124 ± 0.06 g/cm³	1.126 g/cm³
Test Item	Acceptance Criteria	Method	Result
Heavy Metals (as Pb)	≤10 ppm	ICP-MS	<5 ppm	1
Residual Solvents	≤500 ppm	GC-FID	Not Detected
Sulfated Ash	≤0.1%	Gravimetric	0.03%
Microbiological	Absence of pathogens	USP <61>	Complies

♻️ FAQ

     Q: Do you support private label customization?
A: Yes! Full-service solutions:

• Formula customization (purity/dosage/form)

• Compliance packaging & labeling

• Global certifications (REACH, FDA, Halal)

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    Q: How is quality controlled?
A: 3-Stage QC Protocol:

1. Raw material screening (purity/heavy metals)

2. In-process monitoring

3. Batch COA with traceable LOT

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Q: What if issues arise post-purchase?
A: We guarantee:

• 72h response for quality claims

• Free reformulation support (within 6 months)

• Dedicated account manager

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Q: Payment & delivery terms?
A:

• Payment: T/T, L/C, PayPal

• Shipping: Global DDP/DAP (MOQ 25kg)

• Stock: 1,000+ metric tons ready-to-ship