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8.01641

Sigma-Aldrich

Benzoyl peroxide

(with 25% H2O) for synthesis

Synonym(s):

Benzoyl peroxide, Dibenzoyl peroxide

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About This Item

Empirical Formula (Hill Notation):
C14H10O4
CAS Number:
94-36-0
Molecular Weight:
242.23
MDL number:
MFCD00003071
UNSPSC Code:
12352120
EC Index Number:
202-327-6
NACRES:
NA.22
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vapor pressure

<1 hPa ( 20 °C)

Quality Level

200

form

crystals

autoignition temp.

>380 °C

potency

7710 mg/kg LD50, oral (Rat)

reaction suitability

reagent type: oxidant

mp

100-105 °C (decomposition)

density

1.33 g/cm3 at 25 °C

bulk density

500‑600 kg/m3

functional group

peroxide

storage temp.

15-25°C

SMILES string

O(OC(=O)c2ccccc2)C(=O)c1ccccc1

InChI

1S/C14H10O4/c15-13(11-7-3-1-4-8-11)17-18-14(16)12-9-5-2-6-10-12/h1-10H

InChI key

OMPJBNCRMGITSC-UHFFFAOYSA-N

General description

Benzoyl peroxide is an organic peroxide commonly used to initiate free radical polymerizations and to form copolymers through grafting reactions. It is also used as an oxidizer during chemical reactions.[1][2]

Application

Benzoyl peroxide is used:

  • In the direct N–O bond synthesis from 1,2-diamines.[3]
  • As an initiator in the synthesis of the cross-linked unsaturated copolymer by cross-linking methyl methacrylate with Poly (2-butene maleate) polyester.[4]

Analysis Note

Assay (iodometric): 72,0 - 77,0 %(m)
Melting range (after drying): 102 - 105 °C
Identity (IR): conforms

Signal Word

Danger

Hazard Statements

H242 - H317 - H319 - H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Irrit. 2 - Org. Perox. C - Skin Sens. 1A

Storage Class Code

4.1A - Other explosive hazardous materials

WGK

WGK 2

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Certificates of Analysis (COA)

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Direct N--O bond formation via oxidation of amines with benzoyl peroxide
Banerjee A, et al.
Chemical Science, 10(71), 2124-2129 (2019)
Preparation of new substituted bis (benzoyl) peroxides under aqueous conditions in the presence of stearyltrimethylammonium chloride
Moorhoff CM, et al.
Monatshefte fur Chemie / Chemical Monthly, 135(4), 397-405 (2004)
Effect of benzoyl peroxide on the ultrasonic degradation of poly (vinyl acetate
Madras G, et al.
Polymer Degradation and Stability, 73(1), 33-38 (2001)
Preparation A Cross-Linked Copolymer By Using Unsaturated Poly (2-Butene Maleate) Polyester and Methyl Methacrylate
Saltan F
Celal Bayar University Journal of Science, 18(3), 279-285 (2022)

Questions

1–3 of 3 Questions  

  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  3. CAN YOU MENTION PURITY OF THIS BENZOIL PEROXIDE ?

    1 answer

    1. As mentioned in the 'DESCRIPTION' section, the purity is between 72.0 - 77.0 %. The exact purity of this product will be listed on the lot specific Certificate of Analysis. Please navigate to the ‘DOCUMENTATION’ section of the Product Detail Page to access a Certificate: https://www.sigmaaldrich.com/product/sial/801641#product-documentation

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