Methyldibromo Glutaronitrile
AKA “4-dicyanobutane, Bromothalonil, 2-BROMO-2-(BROMOMETHYL)PENTANEDINITRILE, Methyldibromoglutaronitrile, Tektamer 38, Tektamer, 2-Bromo-2-(bromomethyl)glutaronitrile, BBMG
Synthetic
Ingredient Facts
Methyldibromo glutaronitrile
AKA: 4-dicyanobutane, Bromothalonil, 2-BROMO-2-(BROMOMETHYL)PENTANEDINITRILE, Methyldibromoglutaronitrile, Tektamer 38, Tektamer, 2-Bromo-2-(bromomethyl)glutaronitrile, BBMG
Synthetic · Antimicrobial · EWG: 4
Synthetic
Preservative
Synthetic
Clean
A preservative that keeps formulas fresh and prevents bacteria and mold growth, extending shelf life so products stay effective longer.
Solubility Very soluble in chloroform, ethyl acetate. Soluble in methanol, ethanol, ether.
Formula
C6H6Br2N2
Mol. Weight
265.93
CAS #
35691-65-7
Form
Powder
State
Crystals with a pungent odor. Insoluble in water. Used as a preservative in latex paint, adhesives, etc.
See origin →
Functions
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Preserves Formula
Brightens Skin
Fights Bacteria
Reduces Inflammation
Prevents microbial growth
Traditional Use
Developed in the 1970s as a preservative for cosmetics and industrial applications. Designed to provide broad-spectrum antimicrobial protection in formulations.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
No
EWG
4
CIR
Unsafe
Pregnancy
No
CIR Safety Findings
medical-approval
all-shades-safe
Phototoxicity Concern
Regulatory Status
USArestricted
EUpermitted
JAPANpermitted
CANADArestricted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR