Benzophenone-4 (B4)

Benzophenone-4 (B4) Specification

Product Type
UV Absorber / Sunscreen Agent

HS Code
29189090

Poisonous
Non-poisonous

CAS No
4065-45-6

Ingredients
Benzophenone-4 (2-Hydroxy-4-methoxybenzophenone-5-sulfonic acid)

Ph Level
1.2 - 2.2 (10% solution)

Usage
As UV filter in sunscreens, hair and skin care products

Appearance
White to off-white crystalline powder

Molecular Formula
C14H12O6S

Structural Formula
See image / C14H12O6S

Shelf Life
24 months

Purity
>99%

EINECS No
223-772-2

Grade
Cosmetic / Industrial Grade

Storage
Store in tightly closed containers, in a cool & dry place, protected from light

Properties
Excellent UV absorption, good solubility in water, resistant to heat and light, non-toxic

Shape
Crystalline

Application
Sunscreens, cosmetics, personal care, detergent industry

Solubility
Freely soluble in water, sparingly soluble in ethanol

Melting Point
125C

Molecular Weight
308.31 g/mol

Smell
Odorless

Physical Form
Powder

Standard Packaging
25 kg fiber drum

Transport Regulation
Non-hazardous for transport

Heavy Metal Content
<20 ppm

Maximum Absorption Wavelength (max)
285 nm & 325 nm (in water)

pKa Value
6.48

Manufacturing Method
Chemical synthesis

Lead Content
<10 ppm

Synonyms
BP-4, UV-284, Sulisobenzone

Benzophenone-4 (B4) Trade Information

Minimum Order Quantity
25 Kilograms

Delivery Time
5 Week

About Benzophenone-4 (B4)

Benzophenone-4

Benzophenone-4 is an organic compound that belongs to the class of benzophenones. Its also known as sulisobenzone.

Chemical formula C14H12O6S
Molar mass 308.31 g/mol
Melting point 145 C (293 F; 418 K)
Boiling point 305C
HS Code 291450
IUPAC 5-Benzoyl-4-hydroxy-2-methoxybenzene-1-sulfonic acid

Technical Analysis

Specification Typical Values
pH 1.2-2.2
Molecular weight 308.31 g/mol
Density 1.46 g/cm
CAS NO. 4065-45-6
Velocity 274-581-6

Benzophenone-4 (B4) is a protective ingredient that works to keep the UVB rays away from the skin and hair. It is basically a sunscreen but since it is weak,

it is made to work with other sunscreen filters for added protection.

Exceptional UV Protection

Benzophenone-4 stands out for its excellent absorption properties in the UV spectrum, making it vital for safeguarding skin and cosmetic products against UV-induced damage. Its dual absorption peaks at 285 nm and 325 nm provide broad-spectrum protection for both UVA and UVB rays. The compound is stable under heat and light, ensuring long-lasting efficacy in end-use formulations.

Versatile Solubility and Formulation Flexibility

BP-4 is highly soluble in water and can be incorporated into a wide range of formulations, from liquid-based sunscreens to gels and detergents. Its sparing solubility in ethanol allows for flexibility in designing cosmetic applications. The crystalline, odorless powder easily blends into production processes, ensuring consistent product quality.

Safe, Non-Toxic, and Easy to Handle

Benzophenone-4 is classified as non-toxic and non-poisonous, with heavy metal and lead contents well below regulatory limits. The product is non-hazardous for transport and has a shelf life of 24 months when stored correctly. Its non-hazardous classification simplifies logistics for exporters, manufacturers, and suppliers worldwide.

FAQ's of Benzophenone-4 (B4):

Q: How is Benzophenone-4 (BP-4) used in sunscreens and personal care products?

A: Benzophenone-4 acts as a UV filter, absorbing harmful ultraviolet radiation and preventing it from penetrating the skin. This quality makes it an essential ingredient in sunscreens, lotions, shampoos, and other personal care items, providing effective protection against sun damage.

Q: What benefits does Benzophenone-4 offer to cosmetic and industrial formulations?

A: BP-4 offers broad-spectrum UV protection, excellent water solubility, and resistance to heat and light. These properties ensure long-term stability and effectiveness in both cosmetic and detergent products, enhancing product longevity and reliability.

Q: When should Benzophenone-4 be added during the product manufacturing process?

A: BP-4 is best incorporated during the aqueous phase of formulation creation, as its high solubility in water facilitates uniform dispersion. This approach maximizes its effectiveness as a UV filter in final products.

Q: Where is Benzophenone-4 commonly applied beyond cosmetics?

A: Apart from its primary use in sunscreens and personal care formulations, Benzophenone-4 is utilized in detergents and select industrial applications where UV protection is necessary for product preservation and performance.

Q: What is the recommended way to store Benzophenone-4 to maintain its quality?

A: It should be stored in tightly closed containers, in a cool, dry place, and protected from direct light. Proper storage ensures BP-4 retains its high purity and efficacy for up to 24 months.

Q: How does the manufacturing method affect the purity of Benzophenone-4?

A: BP-4 is manufactured via chemical synthesis, a method that allows for rigorous control over purity and quality. As a result, it consistently achieves a purity level greater than 99%, meeting strict cosmetic and industrial standards.

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