A razão social está no cadastro.

Razão social is the official legal name of a company used in contracts, tax records, registration documents, and other formal contexts.

It is different from nome fantasia, which is the trade name or brand name the public sees.

For example:

• Razão social: Comércio de Alimentos Silva Ltda.
• Nome fantasia: Mercado Silva

A is the definite article meaning the.

In Portuguese, it is very common to use articles before nouns, much more often than in English. Since razão is a feminine singular noun, the article is a.

So:

• a razão social = the legal company name

Portuguese has two main verbs for to be: ser and estar.

Here, está is used because the sentence is talking about location or where something is found:

• A razão social está no cadastro.
• Literally: The legal company name is in the registration record/database.

A good rule:

• ser = identity, permanent characteristics, definitions
• estar = location, condition, temporary state

Because this sentence says where the information appears, estar is the natural choice.

No is a contraction of:

• em = in / on / at
• o = the

So:

• em + o = no

That means:

• no cadastro = in the registration / in the record / on file

This is very common in Portuguese:

• na = em + a
• nos = em + os
• nas = em + as

Cadastro is a very common Brazilian Portuguese word. It can mean:

• a registration
• a record
• an entry in a system
• a database profile
• someone’s stored information on file

The exact translation depends on context. In business or administrative Portuguese, cadastro often refers to the official information registered in a company, institution, or system.

So está no cadastro can mean things like:

• is in the registration record
• is in the system
• is on file

The adjective social has the same form for masculine and feminine in the singular.

So you get:

• razão social — feminine singular
• nome social — masculine singular

Many Portuguese adjectives change form, but some do not. Social is one of the adjectives that stays the same.

Plural changes, though:

• razões sociais

Grammatically, you usually want A razão social... in a normal sentence.

Leaving out the article can sound:

• telegraphic
• like a form label
• like note-taking language

For example, on a form or checklist, you might see:

• Razão social
• CPF
• Endereço

But in a full sentence, A razão social está no cadastro sounds more natural and complete.

Yes, cadastro is masculine.

You can tell from:

• the article in the contraction no = em + o
• if it were feminine, it would be na cadastro, but that would be wrong
• the correct feminine form would require a feminine noun, and cadastro is not feminine

So:

• o cadastro
• no cadastro

Yes, A razão social está no cadastro has a very normal Portuguese word order:

• A razão social = subject
• está = verb
• no cadastro = location/complement

This is the same basic pattern as in English:

• The legal company name is in the record.

Portuguese can sometimes move parts around for emphasis, but this version is the standard, neutral order.

Razão is pronounced approximately like ha-zown, but that English spelling is only a rough guide.

A few important points:

• the r at the beginning in Brazilian Portuguese often sounds like an English h
• the z sounds like z
• ão is a very common Portuguese nasal sound

The ão ending is nasal, so it is not exactly like ow in English. Air resonates partly through the nose.

A rough pronunciation guide:

• razão ≈ ha-ZOWN
  with the stress on the last syllable

Yes, it sounds administrative, business-like, or official.

Words like:

• razão social
• cadastro

are especially common in:

• company forms
• customer service
• banking
• legal documents
• government systems
• tax or registration contexts

In everyday casual conversation, people would not use razão social very often unless they were talking about a company’s official registration details.