Sodium cocoyl glutamate vs sodium cocoyl isethionate is a form question wearing a coconut label. Both can be described as coconut-derived anionic cleansers. Sodium Cocoyl Glutamate is the water-soluble glutamate salt, powder or liquid. Sodium Cocoyl Isethionate is the flake or powder that plants melt into syndet bars and rich liquid washes. A PO that says SCI, or “the solid mild surfactant,” is not filled by the glutamate drum.
The glutamate identity, including powder versus liquid assay, is Sodium Cocoyl Glutamate Surfactant: Powder or Liquid. The amphoteric partner people confuse with both of these anions is Sodium Cocoyl Glutamate vs Cocamidopropyl Betaine, Split.
Two coconut anions, two purchase lines
| Sodium Cocoyl Glutamate | Sodium Cocoyl Isethionate | |
|---|---|---|
| INCI | Sodium Cocoyl Glutamate | Sodium Cocoyl Isethionate |
| CAS | 68187-32-6 | 61789-32-0 |
| Class | Anionic amino-acid surfactant | Anionic isethionate surfactant |
| Form on this site | Powder or flakes, or a pale liquid | White to off-white flakes or powder |
| Assay on this site | ≥95% powder, or 25–30% liquid | ≥80% or ≥85%, by grade |
| Listed use | 5.0–25.0% primary; 1.0–5.0% secondary | 5.0–60.0%, liquid cleanser through solid syndet bar |
| Process note | Water phase, gentle stirring; clearest about pH 5.0–6.5 | Hot process; can be melted with other surfactants at about 70–80°C; aqueous stability about pH 5.0–8.0 |
| Extra spec on the page | — | Free fatty acid ≤ 10% |
The isethionate page also lists a 10% aqueous pH of about 5.0–6.5. A similar pH band is not a shared identity. The glutamate has no free-fatty-acid limit on its page. The isethionate has no 25–30% liquid grade on its page. Quote the row you are buying.
“Natural” does not choose the INCI
People Also Ask opens this comparison with “Is sodium cocoyl isethionate natural?” The useful purchasing answer is narrower. Both materials are processed surfactants whose fatty part is associated with coconut. “Natural” is not an INCI, not a CAS, and not an assay. A specification that says only “natural coconut surfactant” can return either salt, or a third one.
If the label must say Sodium Cocoyl Isethionate, order that INCI and ask for CAS 61789-32-0 on the COA, plus the active grade (80% or 85%) and the free-fatty-acid result. If the label must say Sodium Cocoyl Glutamate, order CAS 68187-32-6 and name the powder or the liquid. A marketing line about coconut origin does not authorize the swap.
The same question tree asks which surfactant is best for skin. There is no single winner on these two pages. The glutamate grade is positioned for sulfate-free liquid washes with an acid clarity window. The isethionate grade is positioned for low-irritation washes and for solid bars, with a hot-melt step. “Best” is the chassis: a pump cleanser and a syndet bar do not share a process, even when both briefs say mild.
Sodium coco sulfate and sodium isethionate are further misses
One follow-up asks whether sodium cocoyl isethionate is the same as sodium coco sulfate. It is not. Sodium coco sulfate is a sulfate surfactant. The isethionate is an acyl isethionate. The glutamate is an amino-acid amide. Three INCI names, three CAS families. This site has no sodium coco sulfate page. Do not invent a URL. If the brief names the sulfate, that is the line to source. Do not ship either coconut anion above as a silent substitute.
A neighboring question asks whether sodium isethionate is safe for skin. Sodium isethionate is the hydroxyethane-sulfonate salt. It is not Sodium Cocoyl Isethionate, which is the coconut fatty amide of that acid. Safety papers on one salt do not clear the other, and they do not clear the glutamate. For this comparison, write the full INCI. “Isethionate” alone is how the flake and the unsubstituted salt get stored in one bin.
Eye comfort and “tear-free” belong on the finished product. The isethionate page describes a low-irritation positioning for baby and sensitive washes. The glutamate record, in the CIR amino-acid amide review, includes a HET-CAM score at 5% that was strong or severe, beside human skin tests that were not irritating up to 10%. Neither fact makes the other raw material automatic. Test the formula you will fill.
Bars and thin liquids do not share a warehouse code
Choose the glutamate liquid or powder when the plant charges a water phase and the formula percent has to be tied to 95% solids or to a 25–30% solution. Choose the isethionate flake when the plant melts solids at about 70–80°C, or when the use level runs into the high tens of percent in a bar. The isethionate page allows 5–60% depending on liquid cleanser versus syndet. The glutamate page does not offer that bar band.
Hard-water resistance is called out on the isethionate page, not on the glutamate page. If the brief exists because the wash must hold foam in hard water, say that, and price the isethionate. Do not assume the glutamate powder inherited the claim.
Cocamidopropyl Betaine can sit beside either anion as the amphoteric booster. The isethionate page names it for viscosity and foam. The glutamate page names it for foam density and salt response. It is a third SKU in both cases.
What to send for the salt you actually need
For the glutamate:
- INCI Sodium Cocoyl Glutamate, CAS 68187-32-6
- Powder ≥95% or liquid 25–30%
- Formula percent marked as-supplied or active
- COA, SDS, TDS, and bench-sample size
For the isethionate, send a separate note to that product page:
- INCI Sodium Cocoyl Isethionate, CAS 61789-32-0
- Active grade, 80% or 85%
- Free fatty acid limit if you use the ≤10% line
- Whether the chassis is a liquid wash or a syndet bar
- COA, SDS, TDS, and bench-sample size
Glutamate documents are on the Sodium Cocoyl Glutamate product page. Isethionate documents are on the Sodium Cocoyl Isethionate product page. Match the sample to the row in the table, then scale. A coconut-surfactant line with no CAS usually returns both quotes and a question. A line that names the salt and the form returns the drum you can weigh.
