What is this ingredient?

미국 FDA 물질 등록 · UNII 2K5B8F6ES1 · 등록명 Sodium dithionite · 단일 화학물질

All ingredients

Ingredient Dictionary

SODIUM HYDROSULFITE

Sodium dithionite is an inorganic sodium salt that is the disodium salt of dithionous acid.

Definition

US FDA substance register · UNII 2K5B8F6ES1 · registered name Sodium dithionite · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Sodium dithionite is an inorganic sodium salt that is the disodium salt of dithionous acid. It has a role as a bleaching agent and a reducing agent. It contains a dithionite(2-).

Source: PubChem

Cosmetic roles

Adjusts thicknessVISCOSITY CONTROLLINGReduces other ingredientsREDUCING

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Reviewed by CIR: Scientific Literature Review: Safety Assessment of Sodium Hydrosulfite as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Names & identifiers

SODIUM HYDROSULFITEINCI소듐하이드로설파이트Korean label name (MFDS standard)Dithionous acid, disodium saltSynonym

CAS No.chemical registry number: 7631-94-9
CAS No.chemical registry number: 7775-14-6
EC No.EU chemical inventory number: 231-550-1
EC No.EU chemical inventory number: 231-890-0
DTXSIDUS EPA chemical ID: DTXSID9029697
DTXCIDUS EPA compound ID: DTXCID609697

IUPAC: Disodium dithionite
Molecular formula: Na2O4S2
Molecular weight: 174.1 g/mol

Measured properties

Flash point: &amp, gt, 100 ℃ (o.c.)
Water solubility: 25 g/100㎖
Relative density: 2.4
n-Octanol/water partition coefficient (Kow): (&amp, lt, -4.7)
Decomposition temperature: (&amp, gt, 100 ℃)
Molecular weight: 174.10

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea)

What products actually use it for

What the 14 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Reducing agent3
Bleaching agent3
pH regulating agent2
Cleaning agent1
Dye1
Viscosity modifier1
Processing aids not otherwise specified1
Solvent1

1 other uses

Chemical reaction regulator1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

3 skin studies and 5 eye studies are on record.

Classed as moderate1Classed as low1

The studies disagree (the most common conclusion covers 50%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 8 studies

Not likely to be sensitizing
skin sensitisation: in vivo (LLNA) · Screening · according to OECD Guideline 429 (Skin Sensitisation: Local Lymph Node Assay) , 2002-04-24
Classification not possible
Skin Sensitization · Screening
Category 2
Skin Irritation · Screening
Severe Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) , adopted 2002-04-24 according to
Category 6.4A (Category 2A)
Eye Irritation · Read Across
Severe Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to
Category 2A-2B
Eye Irritation · Screening
Serious eye damage/eye irritation - Category 2B
Eye Irritation · Screening