HA
Acids

Citric Acid

C₆H₈O₇ (2-hydroxypropane-1,2,3-tricarboxylic acid)
Also called Sour salt; "salt of lemon"

Naturally occurring weak acid — sour flavor in baking, set in jams, descaler for kettles, and pH adjuster in DIY beauty.

Comes as granular crystalsfine powder
Common uses pita-cracker tangjam setdescaling kettles and dishwashersbath bombsDIY beauty pH adjuster
On this page baking & pH adjustment ·bath soaks
The basics

About Citric Acid

What it is

Food-grade acids (citric acid, cream of tartar) play roles in baking, jam-making, and household maintenance — descaling kettles, adjusting the pH of homemade shampoos, fizzing up bath bombs.

Key thing to know about Citric Acid

Sourced today mostly from fermenting Aspergillus niger on sugars. In cosmetics, the workhorse for adjusting shampoo and conditioner to the slightly-acidic range hair actually wants (4.5-5.5) — castile soap is alkaline, citric acid balances it. Don't combine with baking soda in a sealed jar (CO₂ release).

dissolve in water (1 tsp per cup for descaling); pinch in baking; 1/4 tsp to adjust pH of a shampoo to 4.5-5.5

These are the most common uses for Citric Acid. Each card explains what to do, why it works, and what to notice.

How to use Citric Acid for baking and pH adjustment

Use a pinch in baking for tang, or 1 tsp per cup of water to descale or adjust pH.

Why it works for baking and pH adjustment

Food-grade acids (citric acid, cream of tartar) add tang to baked goods, set jams, descale kettles, and adjust the pH of homemade shampoos and lotions. A tiny amount goes a long way.

What you'll notice
  • Set homemade jams
  • Tang up cracker doughs
  • Descale kettles and dishwashers
  • Adjust DIY beauty product pH
  • Make bath bombs fizz

How to use Citric Acid for bath soaks

Add 1–2 cups to a warm bath and soak for 20 minutes.

Why it works for bath soaks

A mineral-rich soak relaxes tired muscles, eases tension, and pulls a bit of magnesium into the skin (with Epsom salt specifically). The warmth + the salt is one of the oldest "self-care" rituals in the book.

What you'll notice
  • Ease sore muscles after a workout
  • Soften skin
  • Wind down before bed
  • Pair with lavender for sleep
  • A 20-minute mental reset

Frequently asked questions about Citric Acid

What is Citric Acid used for?+

Citric Acid is most often used for baking and pH adjustment, bath soaks. Use a pinch in baking for tang, or 1 tsp per cup of water to descale or adjust pH.

Are there any tricks to using Citric Acid?+

Sourced today mostly from fermenting Aspergillus niger on sugars. In cosmetics, the workhorse for adjusting shampoo and conditioner to the slightly-acidic range hair actually wants (4.5-5.5) — castile soap is alkaline, citric acid balances it. Don't combine with baking soda in a sealed jar (CO₂ release).

What forms does Citric Acid come in?+

Citric Acid is available as granular crystals and fine powder. Each form has slightly different uses — check the preparation notes for which form fits your purpose.

How do I store Citric Acid?+

Airtight container; absorbs moisture and clumps over time. Shelf life: 2-3 years sealed..

Is Citric Acid safe for pets?+

Citric Acid can be used around pets with caution. Small amounts not toxic; concentrated solutions can irritate paws.

What is Citric Acid also called?+

Citric Acid is also known as Sour salt; "salt of lemon" in traditional systems.

Where does Citric Acid come from?+

Food-grade is the safe household form; available at brewing supply, baking aisle, or as "sour salt"

Reference notes

About Citric Acid

Where it comes from

Food-grade is the safe household form; available at brewing supply, baking aisle, or as "sour salt"

Storage & shelf life

Shelf life: 2-3 years sealed.

Airtight container; absorbs moisture and clumps over time.

Safety

Avoid contact with eyes (acidic). Don't mix with bleach. Concentrated cleaning solutions: ventilate.

Pet safety — With caution

Small amounts not toxic; concentrated solutions can irritate paws.

Type Acids Availability Tier 1