FDA 21 CFR 701.20 Regulatory SOP: True Cold-Process Soap vs. Synthetic Detergent Bars

1. Regulatory Scope & Legal Definition (21 CFR 701.20)

Most mass-market "beauty bars" and "body bars" sold in supermarkets are legally classified as synthetic detergent cosmetics rather than true soap because they replace saponified plant oils with petroleum-derived surfactants such as Sodium Lauroyl Isethionate, Cocamidopropyl Betaine, or Sodium Lauryl Sulfate (SLS).

Under Title 21 of the Code of Federal Regulations, Section 701.20 (21 CFR 701.20), a product is legally defined as Soap only when all three statutory conditions are met:

1. Composition: The bulk of the nonvolatile matter in the product consists of an alkali salt of fatty acids and the detergent properties of the article are due to the alkali-fatty acid compounds.
2. Labeling & Representation: The product is labeled, sold, and represented solely as soap (or cosmetic moisturizing cleanser where full 21 CFR 701.3 INCI labeling is provided).
3. Zero Unapproved Drug Claims: The product makes no antimicrobial, antiseptic, eczema-curing, or dermatological drug claims that would reclassify it as an Over-The-Counter (OTC) drug under the FD&C Act.

2. Saponification Stoichiometry & Superfatting Matrix

| Botanical Oil / Butter | Primary Fatty Acid Profile | SAP Value (NaOH mg/g) | Saponified INCI Nomenclature | Functional Role in Bar |

| :--- | :--- | :--- | :--- | :--- |

| Virgin Coconut Oil | Lauric (C12:0), Myristic (C14:0) | 0.183 g NaOH / g oil | Sodium Cocoate | Rich, fluffy lather & bar hardness |

| Raw Unrefined Shea Butter | Oleic (C18:1), Stearic (C18:0) | 0.128 g NaOH / g oil | Sodium Shea Butterate | Creamy conditioning & barrier lipid |

| Cold-Pressed Olive / Almond | Oleic (C18:1), Linoleic (C18:2) | 0.135 g NaOH / g oil | Sodium Olivate / Almondate | Silky slip & non-stripping emollience |

| Retained Plant Glycerin | Trihydroxy Sugar Alcohol | Formed in situ (~9.5%) | Glycerin | Natural humectant moisture magnet |

3. Unit Carton Principal Display Panel (PDP) & Information Panel Schema

{
  "packaging_spec_id": "FTAAE-PKG-SOAP-CARTON-V3",
  "substrate": "18pt FSC-Certified Unbleached/Recyclable Paperboard (0% Plastic Film)",
  "principal_display_panel": {
    "brand_mark": "FtaaE — For Time And All Eternity",
    "statement_of_identity": "Cold-Processed Artisan Bar Soap",
    "net_quantity_of_contents": "Net Wt 4.5 oz (128 g)",
    "minimum_type_size_inches": 0.125
  },
  "information_panel": {
    "ingredient_declaration_standard": "21 CFR 701.3 Descending Order of Predominance",
    "prohibited_umbrella_terms": ["Fragrance", "Parfum", "FD&C Colorants", "BHT", "Tetrasodium EDTA"],
    "manufacturer_declaration": "Handcrafted in Small Batches by FtaaE Apothecary"
  }
}

4. Batch Release & Labeling Compliance Checklist

• Confirm NaOH lye concentration and 6.5% superfat buffer so zero free caustic alkali (< 0.01%) remains after 4-week cure.
• Verify end-of-cure bar pH falls between 8.8 and 9.6 via calibrated flat-surface pH electrode.
• Inspect paperboard unit carton for dual imperial/metric net weight (4.5 oz / 128 g) in the lower 30% of the Principal Display Panel.
• Confirm 100% of steam-distilled essential oils and botanical clays are explicitly listed on the ingredient panel.